One can dislike how/why DHS was created and also believe that order needs to be restored the area by the feds.
As for the "unmarked cars" picking people up, what is actually happening to these people? Is it catch and release? It seems pretty tame to me.
Should they just let the protesters/rioters burn down the courthouse?
As to whether they are protesters or rioters, ask whether you think Peter Schiff could do what he did during occupy and stroll into the crowd attempting to debate and defend capitalism with the folk (which I think he failed to do at all, but more just the fact he was able to try it there is significant)? The answer is of course not; he'd probably be beaten or severely injured.