Shutter island

[wompastompa]

The ending left you saying .. so what the fuck was the truth?
You don't know if he actually is crazy or if they just brainwashed him...

Its clear to me that he was admitted into the sanitarium for the murder of his wife, and his flashbacks to what had happened affirm that it was true and not some kind of brainwashing

Its Dicaprio's last words on the film that are also important...something like, "is it better to live being a monster, or to die a good person?"

In my opinion, he has realized the truth but is unwilling to accept it, and is why he doesn't resist the people taking him into surgery.