> it also makes me face the reality that I would not want to work with many of the people that resigned
I totally get it. Toxic people tend to clump. And they eventually aim their toxicity at each other. You don't want them in the workplace or really, in your life at all.
> Resigning over a random employee refusing to say that "white supremacy exists" is absurd.
Not only is it absurd, the whole demand to say such a thing was a Kafka trap to begin with.
> I realize that my lack of political fervor is a liability. I wish I cared more about these things, I really do, but I don't.
It's not a liability, at least not in the long term. The time when being 'woke' is beneficial to advancement will come to an end. Because if the fervor one has for politics is what a company values, then they'll get increasing fervor until the place is too toxic to be productive.
Your inability to generate a constant stream of passion for your opinions and hate for contrary opinions is a sign that you are normal. That you are reasonable. And that you are dependable. It's nothing at all to apologize for.
There will always be companies that have employees with different political, religious, and social opinions who will find common ground in their desire to build cool shit and provide value. Go find one of those places and be happy.