People also dont usually buy goods off of felons because they are felond. They pay for it because they want the good. These creators got paid for their opinions and views.
Amazon is also well in their right to deny goods they deem harmful from beeing sold on their website
I argue that amazon banning firearms is fine. They dont want to support something they deem harmfull. Now if patreon deems these ideologies harmfull, why should they be required to support them?
The difference is that the felon example judges the people selling/buying, whereas patreon judges the goods.
That said, I think Amazon can decide whether or not to carry a whole category. Sears Catalogs used to sell guns. Congress passed laws and now sales would have to pass muster. But that's altogether different from selling or not selling a service to someone because you think they are "good" or "bad" or you agree or disagree with their point of view.
To me, Patreon is providing financial services, so I think this judgement is not in their purview in the same way Amazon should not judge who is buying or selling on their platform/services. It's none of their business. Is their business legitimate. That's about it.
To add to this, I think YouTube is okay with having a ToS and denying service to people who violate their ToS (now uniformity of application of the ToS is a different subject). Using the service is not a platform and can't in and of itself create harm. Cash is not harmful. Using cash to buy a gun and using the gun in violence is harmful. Just because cash is a transaction enabler does not mean we deny access to cash to criminals.