The party he's donating money to (https://en.wikipedia.org/wiki/%C3%96rebro_Party) is an advocate of "remigration" that is a policy of forced deportation including of citizens on the basis of ethnicity. They're also it should be added self-declared Marxists, so in this case that's not a hyperbolic usage of the term, it's literally a kind of national socialist party.

Personally I'm not going to not continue to pay for Mullvad any longer. I've never been super squeamish when it comes to disagreements about policy but when you're unironically starting to sound like the NSDAP I'm out.

What is "promoting mixing"?

What does this mean? Be specific.