Do you feel the same way about “Firefox Money: Investigating the bizarre finances of Mozilla”?

Absolutely. It's why I'm not in related threads telling people who are bothered by it that they shouldn't be.

I don’t think we were saying anything at all about the Democrats or the Republicans, and I don’t think it’s controversial that favoring gay marriage is a left-wing position and opposing it is a right-wing position.

My issue is here:

(i.e. “But MY side is the RIGHT one, so it’s different”) is exactly why the right wing thinks Trump shouldn’t go to prison and it’s okay when they cheat in elections.

Even if for some reason you want to limit the scope to a generic "Left" and "Right" even after invoking Trump, you're still creating a false equivalence.

As you acknowledge, we can point to the factual basis for the concerns the Left has about the actions of the Right. The right has misinformation, disinformation, and willful ignorance as the basis for their outrage. "Both sides" thinking they are right doesn't boil down to the same thing when one side actually is demonstrably wrong.