Because he always plays Dafoe.
DON'T BE SO ANTAGONISTIC.
he should play the friend then
He played JESUS.
But he didn't play DaJesus.
He played a very good good guy in Platoon. In his death scene he appeared to either channel Jesus or offer him a final prayer with his mortal coil. Or maybe it was a "WTF, why me?" gesture to the sky.