Just to give some background:
AntiFa was bred to be the Democrat muscle in the age of Trump and the Tea Party. The Dems had high hopes for this army of thugs to bash anyone who opposed them in groups that could be seen on the media as showing large scale support for conservatives or even not Democrats. But the Dems discovered the AntiFa could not be forced to obey their commands. They attacked police and generally refused to follow the script. Eventually, the money for AntiFa dried up.
The bagmen in AntiFa have tried to convince the Dems that they would follow commands but they never do.
More flash bangs
AntiFa has no other agenda that draw attention to itself via violent behavior.........thus ‘distracting’ from those marching.....THEY want the attention. No different than terrorists because that’s what they are.