A left wing racist or bigot who attempts to
police the Punk Rock, Hardcore, or Ska
scene with social media based
politics.
A Stasi will often hide behind a socially protected class or group while actively engaging in latinophobia, antisemitism, or other race based xenophobia. When bands or venues won't publicly agree with their political stance they will try to cancel or rally boycotts against their intended target.
Oftentimes they will share viewpoints with the right wing hate groups they claim to stand against.