New York does their attorney licensing a little differently, it looks like the state Bar Association is not the actual licensing agency, he's a properly registered lawyer who maybe hasn't joined the professional organization.
http://iapps.courts.state.ny.us/atto...HU6jkMXw%3D%3D
But in general attorney advertising is very harshly regulated and even minor exaggerations in public facing stuff are taken extremely seriously, it's an ethical issue that he'd get in trouble for to claim membership in any group he isn't a member of.
Also, flipping out xenophobically at a guy from Massachusetts is only crazy because we know the guy is from Boston. He was a fairly swarthy looking guy who definitely could pass for Spanish or Lebanese or whatever, racism is the PRIMARY driver there. Imagine the flip side, if some douche with a beard bumped into you in the street how ****ing racist do you need to be to immediately assume he's an immigrant and start berating him? (note especially that the guy from Boston's wife was blonde and clearly white, that **** is a huge trigger for the alt-right types)