If that were really the case, that limb would have been cut a long time ago. For all of the seething complaints and attempts to bash Israel from the Left, the people in power are pragmatic and they are going to do what's best for them. If that means being able to take advantage of Israeli innovation, then they'll do it, despite leftist grumbling.
U.S. to defend Syrian rebels with airpower, including from Assad (Reuters)
from the article: Lieberman: Israel will not be the Czechoslovakia of 2010