That will be terribly difficult given that payment processors are also on this ideological censorship train. I think there might be a valid argument as to a sin

That will be terribly difficult given that payment processors are also on this ideological censorship train. I think there might be a valid argument as to a single seller refusing to sell something, but once you get three credit card companies towing that line, that's pretty much unavoidable unless you go to crypto (which eliminates most customers).