As Mayor of a city with many complicated racial and religious relationships, and a huge Jewish community, de Blasio has shown massive and dangerous ignorance. I'm not asking him to recognize every Hasidic sect, but he should know the basic differences between Jews.
I know that the Hasidic, Haredi community has many sects disregarding the rules. I know that because about half of Israel's Coronavirus pandemic is them. But de Blasio here is addressing the entire Jewish community and, while I know he's not an anti-semite, he's definitely doing their job for them.
I’ll wager the very large nonobservant, Reform, Conservative, and even Modern Orthodox communities in New York know he’s not speaking to them.
What matters more than what the Jews understand, is what the non Jews understand.