So when I meet a flat earther I need to be respectful and acknowledge the earth is flat? Those people consider it to be part of their identity too. Why is it o

So when I meet a flat earther I need to be respectful and acknowledge the earth is flat? Those people consider it to be part of their identity too. Why is it ok to dismiss one group but we have to be respectful of another? Anyway, I never said I want to mock people in their face but the ideas they believe in should be fair game.