Mayor can't cry about someone "sending in" Federal Officers. They are full time employed officers who have a duty to arrest someone who is breaking the law. Hell if I were the ATF I would recommend every officer in the tri state area converge on these violent attacks and arrest anyone breaking those specific laws.
Otherwise, we the people may as well start making the old bird bombs for the 37 mm launchers and go help disperse the violent crowd. Old car tires with oil and diesel burning in the area would burn the lungs enough they would not want to stick around, I have been around when someone tried to dispose of them and was too cheap to pay the disposal fee, nasty stuff.