Loud Minority

A loud minority is a group of people that seem to speak for a majority, but in fact take up a minor fraction of true opinions. The loudness equates to their constant badgering and harassment despite only making up a tiny group.

I can't believe how many cis people hate trans people. We'll never get the rights we want.
Nah, man, that's just the loud minority getting to you. Trans acceptance is huge if you look for it.