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No obviously not. So you should seriously doubt that they are there for the same cause as is protested for/against. They are probably there to smear the real protesters by use of violence, looting and damaging, beside police vehicles, private property. Anybody with 2 functioning brain cells can figure out that it would be better for respective cause to stay at home.

Sadly it does, there are a lot of people who just want to destroy.

Great point. But I doubt it, only mindless fools who want to destroy private citizens property join the fascists called Antifa.