Considering a costume?
Dressing as Wonder Woman is fine.
Dressing as Luke Skywalker is fine.
Dressing as Santa Claus is fine.
Dressing as a Nazi is not fine.
Dressing as a KKK member is not fine.
Dressing in heavy makeup is fine if one is playing the part of a clown.
Dressing in blackface? See the part about dressing as a KKK member.
Edited to add: And if you do not understand why dressing as a Nazi, or a KKK member, or in blackface is not fine, you have serious unresolved issues.
= new reply since forum marked as read
And is it "racist" as his base say to wear orange makeup? 
edit: come to think of it, you kind of covered this in your part about dressing up as a clown.
Catholic Easter parade costumes, Mallorca and parts of Spain.
Some of the marchers have chains dragging behind them.
These costumes may look familiar.
https://tinyurl.com/y8k72xm6
