Prime Minister Erdogan's popular tirade on Gaza also hurt his credibility.
The din of Gaza followed Obama's Middle East envoy, George Mitchell, as he conducted a listening tour. Arab leaders wonder why their peace plan remains untouched.
On Thursday he named George Mitchell as a special envoy, and he has already signaled that the US will reengage the region.
Hamas may not be able to prevent other factions from attacking Israel, analysts say.
Israel seeks US help on Gaza weapons smuggling, while Arab nations remain divided over a truce.
Members of the secular Fatah movement, which controls the Palestinian Authority, are divided over how the group should respond to the ongoing Israeli offensive against Hamas.