> PayPal and Stripe don't advertise that they will only do business with organizations with which they agree.
Think about how they can accept 100+ currencies without a relationship with some dodgy central banks in developing countries.
There are absolutely items on that list for political reasons.
> Guns, gunpowders, ammunitions, weapons, fireworks and other explosives. Peptides, research chemicals, and other toxic, flammable and radioactive materials
Why does the payment processor get to dictate whether I can run a defense ordnance company or run a scientific chemical supplies store?
Some of this stuff needs to be challenged in the court or regulated so that payment processor has no say whatsoever in whatever their belief system says about legitimacy of a business.
Because they have the legal right to do so? They could ban companies run by redheads, if they like. As long as they're not discriminating based on very specific sets of criteria established by law, they get to choose who they do business with.
The government requiring private citizenry to associate with everyone who wishes to associate with them seems like a very dark path to go down.
It is entirely legal in the United States to discriminate against redheads, or people whose names start with B, or Hacker News users, or people who enjoy skiing.
Under 29 CFR § 1606.1, national origin is defined as but not limited to: An individual's, or his or her ancestor's, place of origin; or because an individual has the physical, cultural or linguistic characteristics of a national origin group.
If a future Court ever decides hair color denotes national origin, fall back to a different example of your choosing; people with tattoos, Mac users, viola players.
Also, what's your evidence that some payment processors don't handle porn because of government pressure, rather than just natural market forces? I had a friend who did tech for a porn company, and from what he says, even a well-run porn company has much higher rates of chargebacks (e.g., next-day regrets and "no honey I don't know what that charge is") and fraud (stolen cards, fraudulent affiliate program participants).