What the hell? One of these three people fucking murdered someone, this false equivalency "they all play a part" shit reads like something a sociopath would type.
At least in that post, he didn't say cheating is as bad as murder. Speaking of logical fallacies, you are using a straw man argument and are arguing against a claim that he never made. If you want to tell someone they're a sociopath for believing this, go find someone who actually believes this instead of fulfilling that need with other people.
Some people in this thread are wondering how such such a terrible situation came to be and are not satisfied with the reductionist, dismissive conclusion people are coming to that says "don't be a murderous asshole." If the situation were that simple for everyone, it wouldn't happen unless someone is born with brain defects that give them violent tendencies from birth.
It does happen though, with people without violent histories, people who you wouldn't call a "murderous asshole," prior to their crime.
So, why? That's what some people in this thread want to know. A few others just want to drive home that murder is wrong, that the wife was beaten and imprisoned for her emotions which is also wrong, and that you shouldn't murder people. To that, I say "duh," and then I ask the above question: Why did it happen?
What if there's a way to deal with such violent urges beyond muttering "don't kill, don't kill..." or thinking of bunny rabbits/rainbows like a previous poster mentioned after walking in on his wife with another man? What if, by some miracle, we all somehow gain a better understanding of this situation, something that would be helpful to those who've been through something like this and for those who haven't? Wouldn't that be better than misinterpreting purposefully or otherwise someone else's argument and then calling them a sociopath?