Bigotry is a bad look. It's not more acceptable because of your target, either. This sort of communication breaks down goodwill between groups of people.

It's easy to assume one was manually blocked when you go to use a site for the first time one day and you're not allowed to post. Doesn't require any self-centeredness, it's just the simplest answer. "Huh, I was banned... but why?"

Because they're white and male? Get your philosophy in order. If you're against bigotry, then you ought to be against prejudice against all groups or you're just a garden variety, man-hating hypocrite.