So, all of this is wrong
"You're wrong" does not constitute a counterargument.
The murdering happens before and during their seizure of political power.
So the scenario is fascists are just roaming around murdering liberals at a point before they seize political power? What are the police doing? If the police are looking the other way, the fascists already have political power. So what you're talking about doesn't seem at all realistic.
Even if we look to one of the most extreme examples in history -Nazi Germany - it still didn't happen remotely like what you're apparently concerned about.
I'll go ahead and respond to your other post as well:
I’m not talking about the value proposition of having a gun for dealing with run of the mill crime.
This makes the value proposition look even worse. At least run of the mill crime has a semi-realistic chance of happening. Doing something that has negative value in normal times and only pays off if something very extreme like civilization breaking down occurs is kind of irrational.
because “guns bad”.
You'll get further in life if you don't make a straw man out of positions you don't agree with. Although, admittedly, you can get pretty far on straw men and Gish gallops.
Anyway:
We’re (Americans) in a situation where we’re faced with an active and armed fascist movement, and those who would oppose that movement have systematically disarmed themselves because “guns bad”.
If we basically have to worry about warlords wandering around killing people at will then civilization already is done.
What’s your plan for when they decide to remind us that “political power grows out of the barrel of a gun”?
I don't plan my life around everyone being raptured away, aliens landing or civilization completely breaking down. It's irrational to make real sacrifices or do things that require a meaningful tradeoff/risk to avoid such unlikely events.
What’s your plan for when they decide to remind us that “political power grows out of the barrel of a gun”?
I'm pretty sure Mao didn't mean "If you have a gun, you have political power" with that quote. The original quote was “以后要非常注意军事,须知政权是由枪杆子中取得的”. It's not talking about random citizens with guns, it's from the perspective of leading/governing countries.