I dare say any of those people at the Capitol could have expressed their right to free speech in their own towns or state legislatures. And being the liberal I am sure expressing your rights under under the constitution could possibly mean smearing feces on the wall of a public building.
See UJM you’ve yet to say what those people gained by defacing, our Capitol. Both houses were in closed sessions, that were covered gavel to gavel by any number of news orgs (across the spectrum). Do you think those people wanted to disturb the vote? To stop the vote?