The extent to which people and organisations should be permitted private property 'rights' always needs to be weighed up against the public good, and this is no exception.
The protestors were happy to remain outside. There's video evidence of Alex Jones using a megaphone to tell the protestors to walk around the building to the other side, specifically not to enter it.
The protestors were allowed into the building by Capitol Police. The Capitol Police opened the doors for them and ushered them in, offering no resistance. There's video evidence of this as well.
The only casualties were Ashli Babbitt, who was murdered by a still-unidentified member of Capitol staff, and those people who were assaulted by Capitol Police the following evening after the cameras were turned off.
Do your research kid. I can only hope you are joking.