Yup, and most of the charges amount to that. Oh yeah and interfering with official congressional business.
Breaking and entering typically requires some force to illegally enter property, if the doors were wide open or someone else already "kicked down the door" then merely walking through the door is not breaking and entering UNLESS the person entered the property with intent to commit a crime. If someone merely walks through a door (broken down or otherwise) with no intention of committing a crime then it is indeed simple trespassing.
But okay, sure, let's play your game, everyone arrested was guilty of breaking and entering and not trespassing. OMG! We all almost lost our democracy that night to a bunch of unarmed people roaming through the halls of congress! Literally worse than 9/11!
All good questions for you to ask your liberal friends. Me on the other hand, I believe police officers have qualified immunity for a reason and they don't set it aside when accidents happen and you pull your handgun in lieu of your taser, subdue a resisting suspect whose already dying from pre-existing conditions and drug overdose, or shoot someone invading congressional chambers during a coup. Police officers have a hard enough job without having to seriously consider their superiors would rather they get shot than defend themselves.