JERUSALEM — With its Cairo embassy ransacked, its ambassador to Turkey expelled and the Palestinians seeking statehood recognition at the United Nations, Israel found itself on Saturday increasingly isolated and grappling with a radically transformed Middle East where it believes its options are limited and poor.

The diplomatic crisis, in which winds unleashed by the Arab Spring are now casting a chill over the region, was crystallized by the scene of Israeli military jets sweeping into Cairo at dawn on Saturday to evacuate diplomats after the Israeli Embassy had been besieged by thousands of protesters.

It was an image that reminded some Israelis of Iran in 1979, when Israel evacuated its embassy in Tehran after the revolution there replaced an ally with an implacable foe.