Just personally, as a queer and an anarchist, I’ll be doubly targeted if the fascists (already in control of the national government, albeit and thankfully with a comically incompetent leader) decide to send their enemies off to the camps. If they come for me, I want to be able to take some of them out.
Beyond just personally, if enough of those targeted have this attitude, those doing the targeting are likely to reevaluate their decision to be fascist collaborators.
The USA is a failing empire on the brink of going full fascist and anyone harboring delusions about it being able to magically achieve some version of late 20th-century European Social Democracy (complete with the requisite social peace and low levels of firearm ownership) just because they’d like it to is pursuing a fool’s paradise.
Besides, those European paradises of government control and regulation are far closer to going fascist than many may realize, as the recent growth of parties like Alternative für Deutschland and Lega Nord illustrates. Even Europe isn’t really the Europe that liberals tend to imagine it is.
The State and the Right have a near-monopoly on the ownership of weapons, and have been taught (in no small part by liberals who refused to prosecute the Bush Regime for its crimes in Iraq) that they can engage in excesses and get away with it. This is a recipe for disaster, and the absolute last thing we need is to give the State more power to render the oppressed even more powerless.