Gab isn't a site that respectfully questions orthodoxy regarding trans issues. It's white supremacist Twitter. If it were me in his shoes, I'd find the comparison a little offensive, and also feel like it affirmed and amplified my critics.
The idea is that when Electronic Intifada's webhost or their donation processor or Twitter decides they want some positive PR, more and more they can safely say "It isn't a website that respectfully questions orthodoxy regarding US foreign policy. It's anti-Semitic abuse." That doesn't mean I think EI and Gab are comparable, it means I think other people with connections and power think they are, or it benefits them to normalize the comparison.
I don't know that this exchange is going places right now... For something positive, I appreciate all you all are doing with the Great Slate.
Like, I think, most people, I'm a believer in boycotts. You bring the pressure you have to bear on the causes you believe in, and the most potent pressure most people have at their disposal is commercial. It's also itself a straightforward application of free speech. But, then, that's effectively what's happening to Gab, too. It's (again) not clear to me why anyone who is OK with boycotting would be up in arms about it --- excepting people who are sympathetic to Gab's mission. Let me be clear that there's no subtext that you're one of those people!