Frankly STB is a bit of a lefty nutjob, those types are known for excommunicating good friends over minor political schisms... Talking from experience.
Ah I honestly don't know about STB aside from his header libraries and his tech talks, what makes you think he's a lefty nutjob? Briefly looking over his website and X profile, he seems like he's on the left side of the political spectrum, but what inparticular gives you the impression he's a nutjob?