It won't stop if Biden wins: it will be put on pause while any police chiefs or officers on the ground who aren't on-board with being defunded or standing around while antifa destroys cities either are pushed out or retire and replaced with people who don't have a problem with these things.

Then if by some miracle we elect Trump 2.0 at some later date (which if Trump doesn't win I don't know how that would be possible, but let's say for the sake of argument), the burning starts up again with even stronger institutional support the next go-around.