Were the demonstrators invited into the Capitol building? Were they well behaved once inside?
Some of them were, a significant number, once the doors of the Capitol were opened.
Were they well behaved once inside?
Most of those who went inside were well behaved, it appears. Very few went inside the Capitol.
A couple of windows were broken.
The doors were opened from the inside by protestors who entered from the side of the Capitol facing the White House, where construction was taking place.
I never went inside the Capitol.
Some of the police behaved badly. Some of the protestors pushed pretty hard against the police.
Compared to the number of protestors at the rally (roughly half a million), only a few hundred entered the Capitol. (I do not have exact numbers, this is my guesstimate).