> Well sure it would be pretty offense to have a white Nelson Mandela, but people seemed cool with a black Alexander Hamilton. Turns out, context matters.

As you might be aware its not the practice of cross-racial portrayal that is problematic in itself. It's not quite the same when a black actor plays a white person, as when a white actor plays a black person. The difference is that 'blackface' alludes to the systematic oppression of black people, and 'minstrel' performing. There is not the same connotation when it is the other way around.

In the case of Jesus, there is some attempt at erasure going on, certainly historically. It seems white Christians often don't like the prospect of being saved by a middle-Eastern Jew so they tend to obscure the fact in Christian art. (or at least that is a valid uncharitable interpretation) . In contrast we would not find it acceptable to present an alternate history of South Africa in which universal suffrage was obtained using the lifelong activism and sacrifice of a white man.