This just leads them to be hypocrites though, e.g. two wrongs don't make a right, why are you being hypocritical?, practice what you preach, etc.

If you got to that point with someone, you might as well just be explicit and ask them why they seem to hate White people? If they want everyone to get along, then why are they singling a group out. It's pretty easy to tangent this point to if colonization is bad because of the oppressiveness and destruction of one groups culture, then how can you rightly push for that same thing in a different country?

They're utilizing a double standard and not being consistent. Hammer those points and don't let them escape the question.