Whenever there is such a large gathering, all it takes is a small percentage of various factions to do their own thing & cause trouble. The United_States_Capitol_Complex is suppose to be in a secure zone. https://en.wikipedia.org/wiki/United_States_Capitol#Security
https://en.wikipedia.org/wiki/United_States_Capitol#Floor_plans
https://upload.wikimedia.org/United_States_Capitol_building,_Washington,_D.C
Even if most of the people weren't intending to cause any trouble or damage, unauthorized entry into any federal or state building is going to become a big problem for those that did.
https://en.wikipedia.org/wiki/United_States_Capitol#Capitol_Visitor_Center
Although it's wrong to gain unauthorized entry into a federal building, there is something strange about this whole thing.
Could it have all been part of a set up?
By having less police & security there, it became so much easier for people with various agendas to get in.
https://www.latimes.com/politics/story/2021-01-07/dc-riots-capitol-police-reject-federal-help
Now a lot more security will be implemented.
https://nypost.com/2021/01/07/man-in-horned-helmet-at-capitol-protest-identified-as-qanon-backer/
