JERUSALEM — Palestinians living in East Jerusalem have for decades seethed under Israeli restrictions designed, residents say, to push them out of this disputed city. But for Mohammed Bashir, 25, life has now hit “below zero” as Israel’s new far-right government and especially its national security minister, Itamar Ben Gvir, have stepped up house demolitions and expulsions that could ignite the city just as violence is spreading in the occupied West Bank.