As Lawdog points out, there are bad people out there

who want you dead.
Initially charged with murder, the siblings plea-bargained down to manslaughter, the sister getting a ten-year sentence in prison.

Fast forward to November of 2025, and the sister — Angela Walker — ran as an Independent for a seat on the City Council of Bangor, Maine. Well, she claimed “Unaffiliated”, but her campaign was sponsored by these guys — about as Progressive as one might want.

Not only did the fact that she murdered a man by stuffing sand down his throat not prevent her from being elected, but the good comrades of Bangor have announced that her election proves that people can change.

Huh.

We also have the newly-elected Attorney-General of Virginia, who not only openly fantasised about personally shooting the children of an opponent in front of the children’s mother, but offered a lame excuse when his texts about political violence were published.

Which didn’t seem to bother the good comerades of Virginia in the least, since they promptly voted him into office.

Huh.

And, of course, we have the Maine — see above — midterm election for Senator next year. Where the progressive side of things is being represented by a man who wore the death’s head tattoo of the Nazi prison camp adminstrators for years, and who stated on social media: “Tell them that if they expect to fight fascism without a good semi-automatic rifle, they ought to do some reading of history.”

Since the good comrades of the Progessive side of American politics call anyone to the right of Marx and Trotsky a “fascist”, this tends to be a bit worrisome.
Having run into a few of the last('Anyone who disagrees with me is a nazi!'), oh yes, they're out there.  They tend to have savior complexes too('Anyone in a subgroup/type/etc. I feel protective of cannot handle words, they need me to protect and save them!') which makes them feel justified in doing just about anything.  As the saying goes, 

And, in some places(Portland, etc.) the cops are useless; they're either under orders not to trouble the leftists as they attack people, or are personally sympathetic to you being hurt or killed.  Which means that, best you can, you need to be ready to protect yourself.