Imagine if President Trump had even hinted for his supporters to come to Washington and be ready if there is trouble. Then tens of thousands of people showed up, armed and ready. He tells them to march to the Capitol and march they do. About the only thing that could have slowed them down is if Army had decided to send in troops without permission of the Commander in Chief. Lacking that, Trump’s troops would have taken the Capitol and then who knows what... start a civil war, declare a new government, taken control of the submitted electoral votes, or just held the Capitol against anyone who tried to take it back. That would have been an insurrection - not the stay behind the velvet rope tour most “rebels” did.
January 6th was a textbook “mostly peaceful protest.” Except, of course for the ‘unarmed protester” shot dead by the police. That was the only real deadly violence of the day.