I caught that interview of the Capitol police chief, with Tucker Carlson, where their focus was keeping the former in the dark regarding expected disruption. I remember my own reaction to January Sixth: it could have been so much worse. Yes it was ugly, with one fatal shot fired. But no congress people (actual representatives) were harmed in the process and the Capitol was secured by evening, such that the business of formalizing the transfer of power could continue.
However, one could see a large contingent had its hopes up that November election results could be overturned. Even those not directly involved in the plotting, regarding how to make that happen, were trying to sense where events would take them, and were positioning themselves accordingly. Would they be answerable to a continuing Trump administration at the end of the day? The military would have a tough time were it caught up in a direct confrontation. The civilians inside were mostly unarmed, if not entirely.
I suppose the plan was to keep the police very much on the defensive, and to accomplish this by (a) not giving them much raw intelligence regarding what to expect and (b) not providing timely reinforcements to prevent the crowds from wandering through the building. The protest walked a fine line between disciplined civil disobedience and outright mayhem. No fires broke out. The protestors regarded themselves as patriots, not enemies of the people.
I also caught the interview of the so-called Qanon Shaman, Jacob Chansley, on the Jimmy Dore Show. Again, Tucker Carlson was a relevant player in sharing the security camera tapes. Both Chansley and the Capitol police were on the same page: keep the crowds calm and orderly; discourage the crazies from acting out. One could argue Chansley was an acting crazy himself, but he wasn't calling for violence, nor carrying zip ties nor urging that Mike Pence be hung. Chansley is out of jail by now, and running for Congress, where he'd fit right in as another ideologue, given a suit and tie.