I have no problem with what one says be it obscene, political or discriminatory. That is the real world from both left and right but mostly from the left. If it endangers a flight throw him or her off the airplane. If a passenger poses no risk to the flight let them fly. If he or she is a risk they do not fly.
If denied flight without legal reasons you will lose your ass in court as you should.
For example: David Duke of the Klu Klux Klan is a most despicable person worthy of great contempt. Unless he presents a danger he should not be denied flight and to my knowledge has not.
Fischer was somewhere beyond dumb to say what he said.
But, I’m a total believer in that statement that went something like....... “I may disapprove of what you said but I will defend to the death your right to say it”.
According to wiki that statement is attributed, originally, to a writer/historian named Evelyn Beatrice Hall, in 1906.