Really?
I just can't understand how/why JA took over his morals and beliefs. I understand hormones, but he was an adult, not a 12 yr old boy being seduced by an 18 yr old babysitter.
I strongly disagree with your statement and its implications.
If JA had "taken over" Travis's morals, he would have used her and many other women, he would have had a pornographic library, he would have had a well used bar and a drug problem, he would have beaten the hell out of JA for interfering with his plans, he would have beaten up his "rivals". JA would have been hospitalized with broken bones, bruises, lacerations and her DT would have been displaying X-rays of her injuries. For what she was doing to him, if he had allowed her to "take over his beliefs and morals", Travis Alexander would have killed her, not the other way around.
Instead, he kept seeing her potential for good, trying to encourage it until he realized what her game was really all about. And even then he couldn't see the destruction of which she was capable. Travis, while being tempted by some powerful and primitive urges, was, IMO, fighting to hold onto his morals and his beliefs gave him the strength to do so. In the beginning, Travis openly brought JA into many aspects of his life and introduced her to his friends. I think his experience with JA was at first a kind of sexual forbidden fruit, then maybe he thought he could save her (sort of a Florence Nightingale syndrome), and finally he just wanted her out of his life.
JA didn't take over Travis Alexander's beliefs or his morals. What she did was pretty classic abuser behaviour. (ALV was right in that it was an abusive relationship. Except JA was the abuser, not the victim.) JA did her best to isolate Travis from other influences by interfering with his relationships with his church, his friends, and his co-workers. She illegally hacked into his electronic accounts. She was an accomplished break and enter artist who stalked him relentlessly. She was gaslighting him, IMO, by intercepting emails, stealing items--like the ring, appearing without invitation at his door, turning off the household lights, lying to people about their relationship, lying to people about his promises to her, and, I'm willing to bet, much more of which no one was aware but Travis. Abusers tend to keep their victims very busy trying to figure out what is going on, putting out one fire after another. That way, it takes much longer for the victim to realize the enormity of the betrayal and the abuser has more lead to to prepare for an exit of their choosing. Unfortunately, the people around Travis who could see what was happening were unable to convince him that an important part of JA was broken and that he could not fix her.
IMO, we tend to expect people to treat us as we treat them. Despite the abominable treatment of Travis by his parents, he was a decent, normal guy who was capable of sustaining lasting friendships. He was not a fair weather friend. I think Travis gave JA many "second chances" because he believed whatever sob story she was spinning. No one has accused him of using abusive language or behaviour except JA, and that abusive language was pretty mild considering all she had done. And, because he was a decent enough guy, Travis at first thought she would return that decency. It took him a while to realize she was a remorseless stalker. He can't be blamed for not being able to stop her behaviour--if Letterman with all his security was unable to keep his stalker from breaking into his home several times and claiming she was his wife, then Travis can't be blamed for not being able to stop JA from her intrusions.
As for the sex--he was a healthy young man who enjoyed sex. Big deal. As my SIL has said, a single guy will do a balancing act between how much crazy and how much sexiness a woman may be offering. JA offered some physical pleasure, but we only have her words, the words of a proven liar, to say how often that pleasure occurred. We don't know if Travis wrote all the emails attributed to him since JA hacked his accounts. We don't know under what circumstances those pictures were taken. Also, I don't recall the Bishop saying that what Travis had done was irredeemable. From the evidence presented during this excessively long and detailed "retrial", we, can be sure that Travis was not looking at child *advertiser censored*. And if to the Bishop, Sears style catalogue pictures are pornographic, and we see much worse on TV, then it's doubtful that Travis was chasing down adult *advertiser censored* either. And even if he had been, there were options for him to atone and regain his status in his church. The DT has done a pretty thorough job of demonizing the murder victim for being a normal young man in the 21st century.
From what I've seen, Travis had honourable intentions towards Deanna and the other Mormon women he was dating (and I think JA as well in the beginning). He was looking for a wife, not a playmate, and it had become obvious that JA, through her own behaviour, could not be seen as a wife, a playmate, or even a friend. The ring that JA stole/"took without permission of the owner" had great meaning for him. He wanted to build his future with a woman who would happily be part of the Mormon community, not a con artist trying to ensnare him. If Travis had "taken on" JA's morals, marriage to a woman of that particular faith would have been the last thing he would have wanted. He was still holding onto the compassion, generosity of spirit, and responsibility instilled in him by his beliefs. IMO.
A man who is remembered with as much love and missed as much as it's been demonstrated that Travis Alexander is, may have been a man who had lost his way for a little while, but never his moral compass.