is exactly as echoed by "Arab" above: "The reason behind the increase in Israeli passport requests is the sharp increase in the Israeli efforts to revoke the residency rights of east jerusalemites. Actually a 500 percent increase in revoked residency as per haaretz." If a Jerusalemite Palestinian leave to study abroad or live abroad for a year or two, he or she immediately has his/her right to return home revoked by the occupying power. It is well documented by human rights groups that Israel is doing its best to revoke Jerusalem residency for as many as the cities 220,000+ native non-Jews as possible, and as these attempts have increased in recent years, so have the attempts to fight back, including seeking Israeli citizenship if that's the only way to be able to stay or return home. This article is misleading by the way. Yes, many more are 'seeking' citizenship, but according to statistics (Btselem, etc), very few (barely any) actually get their applications approved.
Israel passes law sanctioning force-feeding prisoners (Haaretz)
from the article: Israel reports jump in Jerusalem Arabs seeking Israeli citizenship