You're missing the point. It's likely that he never held those views to begin with. He was just a kid doing and saying what he could to get reactions from people. Clearly it worked, 'cause we're still talking about it.

A tangent, if I may: it's important that entertainers be allowed to joke about things society deems offensive. It allows us to process such ostensibly offensive content in safe environments, to shine a light on the absurdity of such negative ideas. We laugh at nazi jokes not because we agree with naziism, but because they're so wildly divorced from reality and our own views as to be absurd to even consider.