“This isn’t 1972 any more.”
Right you are, and that is exactly the problem. I may be an old man but in my day those creeps would not even have dared to behave in that manner. They would have been well aware that they would have had the s**t kicked out of them.
This kind of thing will continue until the Right starts fighting back with the more pain-inducing tools of the left or variants thereof. Specifically, do not throw the first punch unless you are attacked or in fear of your life, record everything while asking the miscreants to stop, basically just sit there and suck up the abuse. Look like you are being victimized, make sure the cameras/recorders catch all of it and there’s nothing that could be used against you on the recordings.
Then sue everyone involved on the other side in both their professional and personal capacities for millions and millions of dollars. Bury them in lawsuits over each incident - criminal negligence, conspiracy to deprive of civil rights, failure in duty of care, racial bias, hit them with the whole spectrum. Spam the recordings over all media you can get access to. Watch how fast this ends when Leftists in both their personal and institutional capacities stand to lose everything themselves and that they can’t just inflict that on others with impunity. When they realize their favorite tactics just made them a money piñata (how they view the RIght already), they will stop.