My empathy lies solely with the victims and their families. The moment this monster deprived four people of their lives is when he lost all empathy (at least from me).
According to the
CDC, 22.2% of 12-19 year olds in the US are considered to be obese. So, let's say that all of those kids were "bullied" as well. Did 22.2% grow up to commit such a heinous crime? I doubt it very much. For the record, I've always been skinny and I was teased for it as a child and all through high school. Kids can be real jerks! And those kids sometimes grow up to be real jerks as adults, too. Most do not commit murder, though.
And, as far as being teased by girls who said "get away creep," they had every right to do so. If someone is bothering you, you have the right to tell them to leave you alone. We cannot teach our youth to not speak up for themselves for fear of creating a future killer! I should add that I am also saying it's not OK to be cruel to someone, but to stand your ground is perfectly justified.