From CNN :
The major concern of the United States in the current Israeli-Hamas conflict is a potential Israeli ground incursion into Gaza, U.S. officials said Friday.
That would be a disastrous escalation that could trigger a larger conflict, a senior U.S. official told CNN.
"Escalation is what we are concerned about. We don't want it to escalate to the point where Israel feels it has to take additional action, specifically ground force action," the official said.
Perhaps US leadership should stop talking like Israel has carte blanche then.