Censorship is good sometimes? Shocking concept, I know, but unrestricted speech is the law in exactly no developed country for a reason.
It is not a binary choice, either, as seen when Warner Brothers began attaching this disclaimer to a lot of its older projects.
Similarly, when Disney released a lot of its old wartime shorts which are, in a word, problematic - it did so with prologues by various academics/historians explaining the context in which these clips exist.
I really don't think you're prepared to engage in a discussion about depictions of ethnic and cultural groups in media if you don't know what Birth of a Nation is, dude. It's kind of required reading.