User blog comment:Thewritersdiary/In Defense of Bellamy Blake/@comment-25176701-20160216024513/@comment-26500342-20160216025918

'' "To start off, he was suffering from PTSD after the events of S2. Not only that but he had to massacre innocent people because his ally (Lexa) left him and the rest of his people to die. Echo, somebody who he thought he could trust, betrayed him. She allowed Azgeda to kill even more of his people, including his girlfriend. His judgement was clouded because of his very bad experiences with the Grounders and the horrors he went through and watched the people he loved go through in S2. All of these things combined led to his mental breakdown." ''

Yeah, that's what I was getting at, but when I first watched it, it felt very rushed. I think one or two more episodes could have helped immensely.