I don’t see a problem about their work, just because of their political orientation. And frankly, neither should you.
They develop good software, which is open source and everyone can inspect it. There is nothing wrong about them getting paid for it. Not giving donations to them because of what they believe would be the same as an employer running you through a political evaluation before actually employing you.
Don’t get me wrong: there is nothing wrong about not donating (i did not). But not donating, solely because of some ideology a developer of open source Software has (which does not reflect in the code), seems quite stuck up to me.