According to a Pew poll released yesterday, among Americans aged 18–49:

84% of Democrats and 57% of Republicans currently have negative views about Israel.
Both the ruling and opposition voters are uncomfortable with Israel’s policies. These are very large proportions. I hope we will see Israel being ostracized by the US and being left alone in the world arena in the near future—let’s see whether, at that time, they can still attack everywhere like a rabid dog.