if you have to resort to telling someone to check their privilege you've already run out of arguments.
But if you're worried about people's privilege you're missing the point and thats what makes you wrong, because nobody with any intelligence responds to 'check your privilege' with anything but derision. focus on the argument with your own logical persuasive argument instead of accusing your opponent of some sort of original sin.
shouting "check your privilege" at the end of a crypto argument isn't checkmate, rather it reduces your argument to one of nonsense. Discuss ideas.