In ML, it's pretty classic actually. You train on one set, and evaluate on another set. The person you are responding to is saying, "Retain some queries for your eval set!"
This is nonsense. Plenty of nonviolent, peaceful groups carry arms.
Leftists (e.g. Anarchists, Marxists, Socialists, Communists, Queer Liberation, Black Liberation, etc.) groups typically are pro-firearms. Not always, but plenty are. The Black Panthers, famously, were armed, but so are are orgs like the Pink Pistols. Martin Luther King Jr. had many guns for self defense, and carried a revolver at times. Marx famously said that workers should be armed.
Centrists (e.g. Democrats, some Labour parties) typically abhor guns, and value the decorum and principle of the instution to keep us all safe. They are a "if society is well ordered, then there's no need for arms" group.
Right wing folks (e.g. Republicans, Proud Boys, KKK, etc.) are the folks who you are describing -- by and large supporting these measures and also want to use firearms to exert control.
It's really, really important if you consider yourself to be a progressive to ask, "Who will gun control laws in America be used to prosecute? Will that be minority groups dispraportionately?"
Historically and presently, armed minorities are more difficult to oppress, and many many leftist groups have historically and presently been armed for the purposes of community defense. By suggesting that arming oneself is a right wing position you erase history and erode current efforts for folks to build community safety systems.