> If I am a Jewish Doctor and a card-carrying Nazi came in, I should have the right to say "he can sit over there and I will not treat you". And if that causes him to die, that is his fault not mine.

Not exactly. I don't think medical ethics work that way in matters of life and death. For example:

https://www.timesofisrael.com/medics-told-to-treat-attackers...

Israeli medics told to treat terrorists the same as victims

"New rules from Israeli Medical Association require that the wounded be aided in order of severity of injury, even if that means helping assailants before victims"