> In the most reductive case, you could argue that anyone selling food or water to white supremacists is supporting white supremacy.

This, incidentally, is why the term "racism" (and similar supremacist terms) must be understood to refer to embedded social structures that may include honest, and often honorable, people unwittingly perpetuating them and not just being mean to the target. So, the question you are in effect raising is how Cloudflare can be ANTI-transphobic and not simply trans-supporting, and whether it has a moral or other obligation to do so. To me, it's a very easy answer with an extremely difficult execution.