If you go with the presumption Jan 6 was a mob that got out of hand (not my position, just one of the perspectives), then the idea that he wasn’t able to enact his agenda due to the opposing party, coupled with the shenanigans of the other option (no democrat primary for Kamala being one, with democrat party having done similar in the past with Bernie), then claims that the democrats are spinning Jan 6 and risking another term with him seem more reasonable.
Whether I or you agree with those premise is separate from what the zeitgeist is for much of America
The media bubble is something these people seek out. They avoid sources that offend them. They don't go to original sources or seek first hand accounts. When confronted before they get the talking points their responses are rational, then after receiving orders they'll pivot on a dime.