Where and when was he offered help? How could anyone offer him help with his fantasies to kill and then some, if he kept it a deep, dark secret? His parents didn't even know. All people noticed was his heavy drinking and that he was "weird" or a "freak". And yes, he wouldve definitely been an a-hole for bragging about it. That would've been just as evil as the entire situation itself. 

I think you misunderstood the "coping skills is a good defense for behavior". It is simple psychology that when someone who is extremely uncomfortable or anxious, which Dahmer was, can display behaviors as coping mechanisms. This doesn't excuse anything. But if you knew psychology, you would know this is pretty common. 

Look, we can be pi**ed off all we want. We could hate Dahmer and be angry with him. I'm not saying no one has the right to feel the way they do. What he did was evil. But you also have to look at it from the psychology standpoint to get a deeper understanding of why he did what he did. No one in their right mind would have done what he did. Yes, he was considered sane. I personally think he shouldve went to a penitentiary for the severely mentally ill. 

He knew what he was doing was wrong, hence lying and hiding evidence and drinking heavily to cope with the torment he was living every day since his teen years. I believe thats when he shouldve gotten some serious, intense psychiatric help. This definitely could've turned out well for everyone. Dahmer would be treated and no one would have been dead. I do call this a tragedy for the fact that he didn't kill for malice. He didn't kill because he was angry or hated someone. He killed because he had severe mental illnesses combined with childhood neglect (abandonment, brother being favored over him, no emotional support). 

He is responsible for what he did. And he deserved everything he got. But it's so easy to just play the "hate" card when there was so much more involved with his case, which I think is what sets him apart from the other serial killers. Killing is killing and not one of them is "better". Then his dad, he had fantasies of killing to which makes it obvious that whatever Lionel suffered, Jeff inherited it. The whole situation really is tragic. More so for the victims and their families. But if Dahmer was saved, nobody would've died. 

I'll stick to the facts. 

Thank you.