That offends me because of the absurdity and the politicising.
Is that because I am white? - No, but because it is historically inaccurate.
A white Harriet Tubman? - How would that be taken? - Well, it would not go down well, would it?
But what if we had a contrived reason for doing it? - Nope! Same outcome.
A black James Bond? - Well, fine by me! No reason not to.