User blog comment:G4bbster/snk discussion // spoilers/@comment-197.162.113.98-20130801071418

yes, they transformed to titans.

simply they dont have any reasons but they are forced to do so.

No, I dont think he is dead at all ....yet !!

maybe the ape titan is the leader of the other titan, and according do that , he has the same motives as the other titans ....to erdicate humanity.