I lived there at the time. The George Floyd riots were in late May/early June 2020. I went to the protests by the police station in the Powderhorn neighborhood, that's the police station that got burned down. I got the hell out before that, though.
Most of the damage was concentrated in Minneapolis, a little south of the river. But what happens in Minneapolis affects St. Paul, and vice versa. St. Paul wasn't unscathed, either. Property values dipped as a result of the riots, and I'd go find more evidence of that if it wasn't just taken as a fact by the people who live there.
There was also an arson on a construction site in downtown St. Paul later that summer that spooked a lot of folks too.
There's also George Floyd Square, an ad-hoc memorial at the intersection where he was murdered. For reasons beyond me, this was a source of controversy for well over a year, and I know a lot of MN righties who took the city's willingness to leave the memorial there as "capitulating to crime" or something.
In short, don't use Twin Cities property values in the early 2020s to make generalizations about economics or policy. It took years for those scars to heal. Things didn't really go back to normal until 2023 at the absolute earliest, and some things haven't ever gone back to the way they were.
“For reasons beyond me”
It’s not like he was a hero or anything.