The OP is instructing people to be tolerant of being told they're wrong.
Why would someone be tolerant of being told they are wrong if they are confident they are not wrong
What kind of idiocy is that?
I'm not offended when someone tells me I am wrong. They are disagreeing with me. Big fucking deal.
I get offended when someone says that the only possible reason I could possibly disagree with THEM is because I am a Evul Racist. Or stupid. or someone other stupid shit that lefties love to say.