That would likely be even more extreme, wouldn't it? As far as I remember, the protests in HK were massive (as in 5-10% of the population in a single event).
Both are extraordinary, it's not obvious to me who should win the "most well-behaved protest movement" award
It's also not a competition, nobody is trying to diminish the US protests, but I don't think that events of a similar magnitude would have gone down as peaceful in the US.