I'm not a doctor, but if someone gets their head banged on and then drops dead ten hours later from their brain bleeding, I'm disinclined to think that the two things are completely unrelated. Head injuries are no joke. I'll accept that the rioters weren't intending to kill the guy and definitely didn't set out to murder, but I wouldn't completely handwave off any responsibility, either. It's like the difference between "IT'S AN INSURRECTION!!!" and "It was just a fun street party get-together!" No, it was pretty clearly out of hand and definitely went into riot territory. But the people there had more guns on hand than many central American countries, if they wanted to insurrect they would still be cleaning blood off the streets and patching bullet holes in the walls today. Even one person with a decent rifle and a desire for political murder could've easily racked up a double digit body count, but the only one shot was a protestor. So no, it was no "insurrection". Wasn't a peaceful demonstration, either, thanks to the people who went off the handle and started brawling with the cops.
In fairness, the same can be said about the BLM riots. Peaceful protestors were present at them who never raised a hand against anyone, stole anything, or set anything on fire. Problem being the people who were standing behind the peaceful protestors using them as anti-cop shields while throwing molotov cocktails at people and smashing their way into stores to loot them. Both sides can say, "Oh, WE didn't do anything wrong, it was those few bad eggs!" Except the bad eggs in other cities just robbed a bunch of department stores, and ruined the livelihoods of the little people, while the ones in DC made politicians afraid, so guess which group is getting the federal crackdown.