It's not a "tiny" amount of money, this dude is the CEO who makes all of the money in the company and any money going to Nazis is problematic especially when the Nazis in question are almost fully funded by this CEO and yes the CEO is the face and moral driver of a company.
Pretty ironic saying the company supports free speech when the biggest money maker is bankrolling a group that specifically gasses free speech and I doubt the other working there have even a sliver of speech that the CEO does.