If you don’t think talking about white privilege is racist, I advise you to read my detailed explanation of why that’s wrong: https://medium.com/@Zoobahtov/why-talking-about-white-privilege-is-anti-white-racism-c9045b44e023.
“Be polite or shut up” is just a norm of civil discourse. If everyone just started cursing at each other, there’d be no real dialogue or understanding of any sort ever achieved. If you want to be rude, that’s your right, of course, but don’t be surprised when people respond by tuning you out. That’s the point I made to the original poster, and it looks like a bunch of people were in agreement with me.
As for “my privilege” showing, the only privilege I see here is the privilege you implicitly believe you have to make broad pronouncements based on nothing other than your own authority without even bothering to offer anything in the way of actual reasoned arguments.