@beardalaxy and here there is no need to say anything but "good for her". It also doesn't matter that Egypt had a black Pharoah, or even if black people "taught whites to bathe". Good for those black people that taught whites to bathe! Nothing actually follows from any of these claims.
Any time you are reflexively disputing a factoid, you could instead grant it and get back to talking about your own facts, or about any actual point. You can skip "that never happened" and get right to "if it happened, they deserved it"