If the only argument behind why Europe should exist is that you don't like people who look like the people from Sudan or India, then maybe it shouldn't.
(If you instead want to claim that you're not trying to talk about ethnicity and are instead talking about economies or whatever, consider whether the ancestors you mention drawing those imaginary lines over places like Sudan and India were motivated by their desire to colonize and extract wealth from them at the expense of the local populations, and whether that's more responsible for the economic differences between them and Europe than the lines themselves)
