And that's compared to 74 percent of Republicans and 59 percent of independents. But this isn't shocking at all. What's shocking is the Jews still overwhelmingly support President Obama and Democrat Party (although the numbers are down substantially). Talk about voting against your interests.
See Daniel Halper at the Weekly Standard, "Only 40 Percent of Democrats 'Think the Israeli Actions in Gaza Are Justified'."
And check the full report at CNN. Fifty-seven percent of Americans support Israel right to self-defense against Hamas. (Via Memeorandum.)