Simplistic view unfortunately. In most cases, self-immolation is the expression of utter hopelessness, desperation when basic, core values central to your life are taken away and the person doesn't see how to continue. The people doing it are not brainwashed. And apart from few isolated cases, they are not crazy either.

I would never ever do anything like that (or suicide for that matter), but as in most matters, things are more complex than first glance might tell.