And thus processors should be required by law to provide service to everyone unless they are clearly doing something illegal, and even then, it's a matter for the police and courts, not private corporations or individuals.
There's a clear difference between 'aiding and abetting', and the much vaguer 'facilitating', 'supporting', which could be true of phone, or electricity companies for example.
But I believe those companies are required to provide service, as they are 'utilities'.
And I think this is also targeted at pornography? I'm not sure where USA is in the pornography rankings, but I'm fairly sure it's nowhere near the bottom (sorry).
But the point is, even if it were all illegal, that's probably a matter for the police, not for private interests to deny an essential service 'just in case', or because 'we don't want to do business with those people' , etc.