Most major sports championship parades don't have any violence or even fist-fights owing to substance-abuse or over-intoxicated idiots. It didnt happen in Ann Arbor, MI when Wolverines won the CFPNC, the Rangers last November when they won the WS in a parade in downtown Arlington, or the Nuggets NBA Championship parade last June in downtown Denver.
In fact, I can't remember the last time their was any major shootings at a major U.S. city sports team's post-championship parade through downtown areas, at all. Everything went peacefully and orderly in Kansas City during post-SB celebrations in 2020 and 2023, respectively where hundreds of thousands of people attended.
But then again, all it takes is one time and a couple of deluded fanatics, doesn't it?