I'm going to interpret that question literally. A key thing you have to keep in mind is that in almost all of the US outside of a few very large cities, the "street" is not a useful public place. People don't gather and interact on streets in the US. They are merely channels for cars. Protesting on the streets would be as useful in most cities in the US as wandering around next to a shipping lane on the open ocean. The only people "there" are driving vehicles at full speed.
That of course raises the question of where Americans do congregate together. Churches are the answer for many, although I believe those are dwindling. Some go to bars. Neither of those is a particularly good venue for dissent.
One unfortunate consequence of the US being so car-centric is that we've destroyed public space, and consequently made public assembly much harder.