guys COME ON this is obviously the mark of cain talking cause dean would never ever say that.
first of all, he would blame himself and not sam, because charlie was looking for a cure for /him/
second of all, dean worships sam and he can’t live without him so he would never ever want his brother dead
third of all, we’ve see dean go darker again over the last couple of episodes and one and one is two in my book
i’m not saying it’s okay for dean to act this way, cause it isn’t. but if you think that this is the same dean we all know and love, you’re dead wrong and you don’t know dean at all