dunno about 1000+ dead... even during the Civil Rights Movement and Vietnam anti-war protests, which were the most severe protesting movements we've had since the Civil War, we didn't lose that many people. But LOTS were hospitalized because the police primarily used clubs to manage the crowds. Isolated incidents, like at Kent State University, were the severe ones where law enforcement used firearms with live ammo... The footage from those years is utterly unbelievable.... I couldn't even imagine being this age back then lol
Generally speaking, Americans support the ideology of protesting against the government when they believe they're not being treated justly and/or if the country is turning down a dangerous and costly path. To be honest i'm not exactly sure what the movement would be like if it was in America, but i will guarantee that there would be the same behavior, violence, and vandalism that you're seeing in HK. But in America it's just sooooooo much easier to gather large groups of people, march to government buildings, shut down cities, etc. It's honestly embraced and people skip school or work to participate.
Only about a month ago, the teachers and school admins in Chicago (like 30k people or more i think) protested about the schools, how they were getting paid, their treatment, etc. The protests went on for days, they marched through the city streets, and disrupted a lot of what was going on throughout the city.