Yes, protecting people is always the first priority, otherwise there just wouldn’t be a justice system. That doesn’t mean punishing people for wrongdoings.

Yes, I think hierarchy is bad in general, it defines people as not equal. You can’t have a hierarchy of equal members. It has lead to those higher up thinking the laws for us don’t fully apply to them, either because we’re less than human or because they’re more than human. Even the hierarchy of parents has turned children into property instead of, again, people who need help. It might even be why people are more tolerant of shitty behavior, because they don’t feel high up enough in the hierarchy to be able to do anything about it.

Part of the critique of that phrase is its seeming dismissal of context and nuance. Authoritarianism isn’t really a system of thought, but even without mentioning that, you’re going to have a tough time drawing hard lines around behavior without infringing on valid personal freedoms. Though, in general, seeing how your beliefs map onto different ideas is a good way to interrogate yourself and try to determine if you should keep that belief as is. If an idea of yours seems to tie in with a system of thought you’re opposed to, maybe ask yourself why that is and what aspects you identify with versus the aspects you can do without.