Trumps mistake was that he thought telling his supporters to go to DC would be just another huge rally. Add in bad advice by advisers close to him, and you get what was got. He didn't think it through. Too busy thinking YUGE rally where its all fun and laughs with a huge audience that loves him. He didn't account for the possible and probable bullshit antifa/blm/TDS crowd pretending to be supporters, nor did he pay attention to the ads placed before the "event" to other rioters/scum to dress like supporters, wear maga hats, and pretend to be supporters so they could get closer than usual to wreck havoc. Was he to blame for what happened? Maybe a little bit for NOT THINKING, which is rare for him. He was too busy planning his "party rally" with adoring fans.
Was the lame stream media at fault as well? you bet your ass they were and are. But the major players are the enemy...Dems and their thugs, along with cowardly Repubs who probably knew in advance as well and either A) didn't warn Trump what would happen or B) knew and hoped it would finally get him truly hated/blamed.
So...the plan worked and now we are doomed with a crazy dementia guy and his worthless VP that even her own party didn't want her and probably still doesn't want her but at least it got Trump out.