The only reason for America to restrain Israel was to avoid an escalation of conflict in the Middle East that could drag in American forces. Events since 2001 have rendered this point moot. Americans have not kept Israel in check, so much as a balance of terror between Pals and Israelis.
Iran deal opposition grows among U.S. Republicans, Reuters poll shows (Reuters)
from the article: Israel's looming war in Gaza: Can Obama stop it before it starts?