Extremism means different things to different people. Extremists IMHO are not always a tiny minority.
These are what I consider to be aspects of extremism.
Desire to kill people who haven't done anything to you. Using the government to silence/surpress people who's ideas you don't like. Forcing your religious/political beliefs on others. Civilian disarmament advocates for their frequent fear/ignorance fueled anger and bigotry towards all weapons owners (often excluding the government) . Anarchists for wanting no law and order.
People who are hateful towards certain groups aren't necessarily extremists, because some people deserve to be scorned and hated. For instance, terrorists and rapists deserve to be hated for their actions.
These are what I consider to be aspects of extremism.
Desire to kill people who haven't done anything to you. Using the government to silence/surpress people who's ideas you don't like. Forcing your religious/political beliefs on others. Civilian disarmament advocates for their frequent fear/ignorance fueled anger and bigotry towards all weapons owners (often excluding the government) . Anarchists for wanting no law and order.
People who are hateful towards certain groups aren't necessarily extremists, because some people deserve to be scorned and hated. For instance, terrorists and rapists deserve to be hated for their actions.