My point was most Americans have no experience with these sorts of events despite their apparent pervasiveness, just as most Europeans have little experience with far-right parties despite their recent successes.
Most financially well off, white Americans have no experience, I suspect that's also the demographic of most people on HN. I have friends who come from a poorer background than me and most of them have either been subject to police abuse themselves, or have friends/family who has been abused or even killed by police.