There's no political argument that you can't turn into a slippery slope like this. You can get to Brendan Eich with just a few more hops from a starting point of "refusing to donate to Trump". So that argument isn't very interesting.
What might interest you more is that I agree with you about Brendan Eich. I think Eich's situation is nothing at all like that of Thiel's. Eich was a full-time employee of Mozilla. From what I know of the situation, Eich hadn't made any of his employees at Mozilla uncomfortable. Eich's support for Proposition 8 was quiet: people dug it out of a database to use against him. And while I disagree with the stance he took against marriage equality, opposition to marriage equality doesn't challenge equal access to the channels of democracy. Eich wasn't campaigning to remove the Muslims from our country, or to imprison those who disagree with him.
OK, you'll be shocked. That's fine; politics is a matter of taste. For that reason, it is ever plagued by this sort of fuzzy, tone-policing, last-year-you-could-say-that-but-not-this-year, latest-fashion argument. Most political pundits owe their careers to that insipid bullshit. Personally I'd like both of the candidates under discussion to go jump in a lake, so we could elect someone opposed to the Eternal War on Everything. That's off-narrative, however, so it will be best to avoid both rural Arab weddings and plant-based pain control for some time to come.
