I think we're talking past each other.
I'm not saying the 'punch the biggest bully' will work. I'm saying my experience with folks adjacent to and of a similar mindset is, when confronted with violence, they tend to back down just a little bit. They attacked Rittenhouse after he shot someone. And yet, he got out, relatively, unscathed, because they were not willing to deal back in lethal violence. And the attacks after him shooting were more modest. The mindset you may have to have when dealing with these folks if threatened with deadly force is to shoot first and move. By shooting you're creating an egress opportunity, not a gunfight opportunity. It might turn into a gunfight, hopefully not.
Think of it as the ultimate OODA Loop reset for the crowd around you.
I should have been clearer it might get the crowd to back off, permanently, or it might get them to take a step back as they breathe in to come and kick your ass. Either way, you're working against a group that isn't as dedicated as jihadists. Despite what they preach, I don't think these folks are genuine true believers. Their interactions and response when confronted with violence seems to indicate that. Yes, they may try to overwhelm someone and attack them, but they aren't doubling down on their fight and turning it into a fight to the death.
ETA: In my, non-professional, opinion, being ordered by non-law enforcement to exit a vehicle at rifle point meets the definition in most places for reasonable fear of death or injury.
Everyone should do what they think is best in their circumstances. My philosophy isn't to stand around and argue the finer points of the law with people who are holding rifles on me. It is to find an opportunity to escape.
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Regarding the political support. It's all over the place and I'm not sure the media or the world knows which way people lean. The Op-Ed pieces here in Chicago initially painted Rittenhouse as a thug looking for blood, but then backed down on that position when more and more video showed him being attacked. I've seen a lot of folks who view aggressive BLM with distaste enough that they're backing down from their support of them. Not all, mind you, and I'm sure some of them are backing down only to re-up in their support at a later date when they've forgotten what is going on.
What needs to go on is a counter-narrative. Frankly, you fight a 'war' like this, by galvanizing the people against it. I hate to say it, but getting BLM folks to burn a nursing home or a daycare will go a long way towards turning the public against them.
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ETA 2: Should folks, who find themselves in the unenviable position of being charged with a crime after a self-defense shooting, begin to think about having bench trials instead of jury trials? Particularly in judicially 'unfriendly' areas? I think this is a travesty of justice in many respects. But I can't help but wonder if it's easier on appeal, if you're convicted and you have the high(er) knowledge of the law with a judge. Of course, if you draw an activist judge, this may be a bad idea.