If Rittenhouse walks the extremists will be energized and reassured that they can start the shooting.
If Rittenhouse is punished then the extremeists will be enraged and will likely start shooting blacks on the streets.
There's no good outcome possible and the opportunity for the extreme right isn't going to be better.
Chauvin failed and the Rittenhouse opportunity doesn't come along often.
If a cop can't do it, then make out that a 'little boy' can. They won't pass up the opportunity this time.