Here is a short list of Arendt’s pre-totalitarian signs that we see very strongly in our society:

• Widespread loneliness and social atomization.
• Loss of faith in institutions and hierarchies
• A desire to transgress
• A rise in the power of ideological thinking
• The increased use of propaganda
• The value of loyalty – to a person or to an ideology – more than expertise
• The politicization of everything

Rod Dreher

I could see totalitarianism coming from the Right, though cancel culture, which overlaps several signs, is mostly a Left phenomenon.