https://hotair.com/archives/john-s-2/2019/12/31/anti-semitic-attacks-new-york-area-2019/ , an attempt to do a chronological list of antisemitic incidents and attacks against Jews in NYC during 2019. My eyes got crossed and I lost count around 27. Keep in mind that this list is what John Sexton could find using
GoogTube and his own
Google-Fu: there may be some he did not find; some targets didn't report what happened to them.
Whatever sociological/ideological phenomena have brought this about, it isn't the right-wing Trumpers or white supremacists doing it. And government officials and MSM spokesmouths who have proclaimed that white supremacist thugs as the great threat have given cover to the people who actually are doing this @#$%.
The white supremacist thugs have been mostly keeping their heads down, for whatever reason, and actually dealing with the real problems might encourage those thugs to keep on keeping their heads down.