Well in the interest of accuracy we don't have positive evidence for that and we don't do ourselves any favors by promoting inaccuracies or propaganda. I agree there is mounting legitimate suspicion that the riot was provoked by anti-Trumpers--most likely leftists/Democrats--but without hard proof, we cannot definitively say that.
Meanwhile the left doggedly holds on to their crumbling narrative that the J6 event was a 'violent armed insurrection' when it was nothing of the sort.
For instance, Jake Angeli Chansley, the furry hat Viking guy, has become the poster boy for the J6 insurrection propagandists. He was arrested and convicted of 'obstructing a police officer' and remains in prison with 2.5 more years to serve. Ex navy guy, he's a little weird and likely a conspiracy theorist for sure, but tell me if ANY BLM or ANTIFA person ever got a sentence like that for non-violently obstructing a police officer?
Jake is a thoroughly non violent person and did no violence at the Capitol that day. Here he is that day with Michael Vos, Nancy Pelosi's son-in-law. Vos, a reporter, was likely interviewing Chansley.
And again here is that 'existential threat to our democracy' being peacefully escorted into a congressional chamber by a Captitol policeman. Another piece of video the J6 Committee never intended anybody to see.