I haven't seen this Particular documentary, but I know PBS has shown different ethnic documentaries. I have seen the "Italian American Experience" a couple years ago (don't know if it's the same producers) and liked it so much that I purchased it for my parents who really enjoyed it. They also have "The Irish-American" Experience and several others that they showed for a while.
What exactly does the NY documentry cover? Anyway, I'm not a real big documentary fan (depending on the subject), but this sounds interesting.
TIS
"Mankind must put an end to war before war puts an end to mankind. War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today." JFK
They also have "The Irish-American" Experience and several others that they showed for a while. 
