Earlier quoted context omitted.
Quoted post unavailable.
I'm sorry, I'm not American, nor do I live somewhere where there is anti-jewish sentiment. Is calling a Jew "Hassidic" derogatory?
Noting a person’s Jewish heritage or faith or membership (or that of a business’s proprietor, or some noted portion of their clientele) when their Jewishness is not directly related to the rest of the point is often a signal, like a dog whistle (which is a term often used for this kind of signal). Particularly taking such notice in reference to New York is a strong signal, and often “New York” is used as a substitute for the signal when similar connections might be expected. The first thing it signals to antisemites is identification of a target—either for immediate ridicule, harassment, some other form of abuse… or for identification which places a longer term target on them. The next thing it signals is that like minds are present.
This was all somewhat obscure for even a lot of Americans, and easy to dismiss as an honest mistake rather than an intentional signal in a comment like yours, only a few years ago. Unfortunately a lot of white supremacist movements latched on to these kinds of dog whistles in the course of an election and ultimately an administration which both directly fostered these kinds of dog whistles and indirectly invited them into the mainstream by dismissively reacting to them (and sometimes rehabilitating them on the spot as “very fine people”).
Even so, when it was so obscure, it was a way for fellow travelers to target victims and find compatriots. It’s just a lot more visible now and a lot harder to take comments like [edit: not yours, sorry!] as in good faith.