If you ever been to a BLM protest, organizers frequently would flag undercover cops. There has always been instigators/troublemakers at any protest, and we always want to ensure that those who were would quickly get removed (even if the troublemaker was the undercover cop in general).

So to tell me Jan 6 went so far without any police presence?

Even allowing protestors to beat up cops? After the fucking show of force the Blue did to stand against BLM?