It was a leftwing tactic.
When the 'chaos' play was seen as working against democrats... thugs running the democrat party told Antifa and BLM to stand down - and they stood down.
If Biden's elected these groups will come roaring back...and federal thugs (FBI etc) will protect 'the rights' of Antifa to burn our cities down in red states.
BLM has been exposed. It doesn’t have a fraction of the public support it did. Andy Ngo routinely posts BLM mugshots on Twitter. A larger collection of mental case losers, you will never find. No normal person wants to join THAT team. Without normal mainstream types supplying cover these loons, they will dissolve back into whatever basement they came from.