After thinking about it a bit I actually think this makes sense.
Imagine a bully on the playground, in a group of other bullies who have all convinced themselves they’re the victims. The bully has a baseball bat in their locker that they use to terrorize smaller children who wear blue hats because that means they’re secretly out to get the bully. The bully heard one time on another playground a kid in a blue hat hit a kid with a baseball bat, just like our bully. Every time a bully beats the hell out of a random kid at recess there are short term exclamations from the all kids asking for the school to take away the weapons, even though they die out quickly, the bully takes offense at the idea of someone taking away his only tool to protect themselves from spooky blue hats kids.
He stands tall with the other bullies at recess holding little signs, we dare you to take away our baseball bats! Genuinely simultaneously afraid and empowered. They inflict actual threat of violence because they internally have conjured the idea of violence against themselves.
In this recess analogy, hall monitors would stand with the bullies, having baseball bats themselves and also being afraid of the blue hat kids.
If one day a blue hat kid brought a baseball bat to protect themselves the hall monitors and teachers all immediately crack down on them and take it away, because obviously it’s not for self defense they’re “clearly” out to get the hall monitors.
I don’t think ideologically cops would take guns from people who think like them and ally with them, rather from “rebels” and “others” who start a genuine rebellion against a facist regime. Obviously from the perspective of the enforcement of laws against guns the police are the arm of the executive among the people, but they choose when and where to enforce laws all the time.
Apathy prevents violence, and will continue to do so until the vast majority of people are in constant pain and fear with absolutely no alternative. When the people have nothing to lose they will act.
Even the most politically aware and ethically minded among us can’t drop their daily lives in favor of standing up for the oppressed when standing on the razor edge of working every day to avoid homelessness.
Those who are not on the razor edge have “more to lose” by toppling the system