“Btw, an Arab state would never pay to keep all those Chareidim in kollel forever.”
At best they would extort money from other yidden to allow them to stay as beggars (Dhimma), and let them be as a source of income. At worst they would line them up and shoot (gas chambers are so 20th century), after giving the women over to the fighters as prizes until they are “used up” (like the Tutsis).