Killing is part of the ideology, they openly encourage each other online to kill as many "normies" as possible, they idolize mass killers.
Supposedly, LE should have checked his social media before he was certified to own a gun, this isn't rocket science knowing what incels are about.
Despite all the mass killing, I think Canada is the only country that has convicted them under terrorism law.
Incel - Wikipedia
On August 4, 2009, George Sodini opened fire at an LA Fitness health club in Collier Township, a suburb of Pittsburgh, Pennsylvania. Three women were murdered and nine other people were injured before Sodini killed himself. He purportedly expressed sexual frustration and complained of constant rejections by women on a website registered in his name
Elliot Rodger killed six people and injured fourteen others before killing himself in Isla Vista, California on May 23, 2014, near the campus of University of California, Santa Barbara. These killings drew media attention to the concept of involuntary celibacy, and particularly the misogyny and glorification of violence that are a mainstay of many incel communities. Rodger self-identified as an incel and left behind a 137-page manifesto and YouTube videos in which he detailed his involuntary celibacy and discussed how he wanted revenge for being rejected by women
Chris Harper-Mercer killed nine people and injured eight others before killing himself in a shooting at the Umpqua Community College campus on October 1, 2015, in Roseburg, Oregon. He left a manifesto at the scene, outlining his interest in other mass murders including the Isla Vista killings, his anger at not having a girlfriend, and his animus towards the world. In his journal writings, he had related with Elliot Rodger and other mass shooters, describing them as "people who stand with the gods"
William Atchison killed two people before killing himself on December 7, 2017, in Aztec, New Mexico, in a shooting at Aztec High School, where he had previously been a student. He had used the pseudonym "Elliot Rodger" on several online forums, and praised "the supreme gentleman" (a term Rodger had used to describe himself, which has since become a common reference among incel communities). Atchison had also posted far-right content online
Nikolas Cruz was accused of killing seventeen people and injuring seventeen others on February 14, 2018, in a shooting at Stoneman Douglas High School in Parkland, Florida. Allegedly also motivated by other extremist views, Cruz had previously posted online that "Elliot Rodger will not be forgotten".
After an April 23, 2018 vehicle-ramming attack in Toronto, Ontario, Alek Minassian was convicted of 10 counts of first-degree murder and 16 counts of attempted murder. Shortly before the attack, Minassian had allegedly posted on Facebook that "the Incel Rebellion has already begun" and applauded Rodger.
On November 2, 2018, Scott Beierle killed two women and injured four women and a man before killing himself in a shooting at the Hot Yoga Tallahassee studio in Tallahassee, Florida. He had been a follower of incel ideologies for a long time, and also had a history of arrests for grabbing women's buttocks. In 2014 he posted several YouTube videos of himself espousing extreme hatred for women and expressing anger over not having a girlfriend, mentioning Elliot Rodger in one video
Bryan Isaack Clyde began what was intended to be a mass shooting at the Earle Cabell Federal Building and Courthouse in Dallas, Texas on June 17, 2019, but was shot and fatally wounded by officers from the Federal Protective Service before he injured anyone. Clyde had shared incel memes on social media, along with other posts referencing right-wing beliefs and conspiracy theories.
Following the incident, the Joint Base Andrews military base briefed its personnel on incels, with a spokesman describing them as "a very real threat to military members and civilians".
Incels have also praised attackers with unclear motives who they believe to be incels. After the 2017 Las Vegas shooting, some of the incel community celebrated the shooter Stephen Paddock, who they felt was a hero who was targeting "normies". After the 2018 Toronto shooting, posters on an incel message board expressed excitement with the possibility that the perpetrator might be an incel, although no motive was identified
Tobias Rathjen committed two mass shootings in Hanau, Germany on February 19, 2020, killing ten people and himself, and leaving behind a manifesto described by Insider as "delusional". Some media sources described Rathjen as an incel, though fellows at the International Centre for Counter-Terrorism wrote that while the manifesto was "riddled with misogynistic remarks", some of which were similar to common incel topics, "the manifesto does not demonstrate a clear connection to the incel identity, either in terms of evidence that the shooter frequented incel forums or shared basic incel ideology".
On February 24, 2020, a female spa worker was stabbed to death in an attack that also severely injured her female coworker at an erotic massage parlor in Toronto. On May 19, the Toronto Police Service declared the attack was being treated as a terrorist incident after evidence pointed to the stabbings being motivated by incel ideology, and police laid charges against a 17-year-old male alleged to have committed the stabbings.
This was the first time violence thought to be motivated by incel ideologies was prosecuted as an act of terrorism, and is also believed to be the first act of violence not perpetrated by an Islamist extremist to be prosecuted as terrorism in Canada.
Armando Hernandez Jr. allegedly opened fire on May 20, 2020, at Westgate Entertainment District, a mixed-use development in Glendale, Arizona, before being arrested by police. A 19-year-old man was critically injured, while a 30-year-old woman and a 16-year-old girl suffered minor injuries. According to the Maricopa County prosecutor, Hernandez identified himself as an incel and claimed he wanted to target couples and shoot at least ten people.
Between January and the end of July 2020, five self-identified incels were arrested in separate incidents in North America for planning to kill women. Among them was Cole Carini, a man who was charged with making false statements to law enforcement in June 2020 after claiming serious injuries to his hands had been caused by a lawnmower accident. Police alleged that Carini was actually injured while trying to make a bomb, and that he had written a note threatening violence against women and referencing Elliot Rodger.
In April 2021, a 19-year-old self-described incel was arrested on federal charges after allegedly videotaping himself approaching women sitting outside a restaurant in Manhattan, New York and telling them he was going to detonate a bomb. The man had previously been arrested several times for harassing others, often while recording or livestreaming, and for multiple assaults with pepper spray.
In July 2021, a 21-year-old self-identified incel from Ohio was charged with attempting a hate crime and illegally possessing a machine gun. The man was a frequent poster on a popular incel website, where he wrote posts venerating Elliot Rodger. He wrote a manifesto in which he expressed his desire to "slaughter" women, and in another document he allegedly wrote about his goals to kill 3,000 people in a mass casualty attack.
22-year-old
Jake Davison killed five people and then himself in a mass shooting on August 12, 2021, in Plymouth, England.
He had posted videos online in which he expressed misogynist and homophobic views, expressed hostility towards his mother and others, and likened himself to incels. He had also used incel forums on Reddit to express hateful views.