Identify authoritarianism on the right : Omg all of them.
Identify authoritarianism on the left : A few cancelculturists bitches in a basement.
There are certain policies that require exerting immense control over people.
Such as the EPA, and Climate Change. Gun Control. Taxation and redistribution itself.
We are not without exercising ideas of authority.
It is just that their end goal is far more absolute and likely more terrible than ours.
HOWEVER...
The differences sort of fade into the background once violence begins. How do you stop a terrorist? You kill them. You root them out. You target those associated with them. AKA, to fight in combat... you do fascist things. You exert absolute control over and conquer your enemies. At the end of the day, the public will never see a difference unless we treat people better. But that would be a luxury we cannot afford if we devolve into civil war and are fighting for our very lives. Poverty, scarcity, sacrifices will be made.
Whatever we are today, is not likely who we will be afterwards. There will be losses.