Throwing the B.S. flag on this line of thought.

Yes, They could go kinetic.
(Have already in fact, but only in places where they enjoy local acquiescence to their idiocy, with local mob superiority. Which is <2% of the country, by area, btw.)
20 guys tried that on airliners a couple of decades back.
It worked for less than 2 hours, and had a .750 batting average even that day.
It’s batting .000 since that time.
There’s a harsh lesson on the lifespan of that plan, right there.

Pantifa would fare even worse, and for less time.

It would be open season on them.

But not like Gettysburg.
More like Simo Häyhä vs. the Soviet Army.
Times 10,000.

They want to form up large groups for violence?
Cool.
Target-rich environment.
Raconteur Report: Tomorrow
That was a notional four guys, FFS, (4 v. 1000+, if you want to be scrupulously accurate) and to give you an idea about planning, I spun that entire yarn in a 10-minute stretch early one morning.
This ain’t rocket surgery.

Would The Mob’s tactics evolve after that, or a few times of that?
Certainly.
Starting with 90% of them staying their asses home, permanently.
cf.: Number of protests Moldylocks has attended after getting punched in the mouth: ZERO.
Second Harsh Lesson, inbound.

Mobs are the same: everybody wants to be gangster, until it’s time to do gangster shit. Kyle Rittenhouse was outnumbered 1000:1. He popped only three of the motherfuckers, one of them armed with a firearm, and nobody else wanted any more medicine after that. Nobody.
Third Harsh Lesson, if you’re keeping score.

Want more lessons?
1) They’re absolutely chickenshits.
2) Don’t leave live victims.
3) Do unto others, then split. Don’t hang around to tell your side. GTFO.
4) You can’t get facial recognition from a ski mask.
5) You can’t get ID on someone in the shadows.

If he’d popped three of those motherfuckers from cover, in the shadows, with a mask or balaclava on, he’d be laughing about it in anonymity today, and that riot would’ve ended before the third body hit the ground.

FFS, the IRA figured that shit out 55 years ago.
If people think they’re going to fight like Redcoats at Concord Bridge, they’re going to leave a similar trail of dead and wounded, and get their shit pushed in.

Hide behind rocks and trees, and fight like goddamed Indians, dammit.
You’re Americans: fighting like sneaky little shits is your birthright.

The Patriot – Aim Small, Miss Small – YouTube

If you find yourself in a “fair” fight, you already dun fucked up, royally.
This should look like harvesting baby Harp seals. Every time, all the time.

AND. IT. WILL.

Thus Endeth The Lesson.

Error happened.