Just because someone speaks yiddish, doesnt mean they are qualified to be a special Ed teacher, there is no mandate by NY to teach special ed in any language except english, Sometimes they will try to find a native speaker as long as they are qualified. They can usually find a spanish speaker who is qualified as there are alot of those.
There is also no mandate that says your kid should not be in a class where songs are sung in december about an evergreen tree. Otherwise Muslim , Hindu and other children of other religions could use the same argument
I picked Pashtun because was sort of neutral and NYC was actually looking for qualified Pashtun speakers and coulndt find any. Had I said SPanish people would have said well, there are spanish special ed teachers , There are because there are alot of spanish speakers and its not to hard to get a qualified spanish special ed teachers
And qualifications are set by the state and they include a masters in special ed from an acceditited university. I dont know exactly what the qualifications for a Bi-Lingual Special Ed teacher are. Ill assume you need that masters degree and the ability to show proficiently in that language