These displays are useful propaganda, even unwitting.
It demonstrates to the committed anarcho-communists that the right has them totally outclassed in material resources.
And likely skills as well...welding...heavy equipment...machine tools...money...land and property etc.
While it enrages them, they know a counter-revolutionary force would defeat them soundly.
Well, perhaps the #ByeDUHNsLootersMatter crew will have a skateboard rally.
Good point.
I doubt they reason that out, but if they had any brains, they would.