I think we would if things started getting hairy for Israel, defense pact or no.
No way. If we entered on the side of Israel, the fallout in the Arab world, including Iraq, would be huge. You think oil prices are high now. Let us fight on behalf of Israel and you will see the world economy go south in a hurry. Israel can take care of itself. It really is Goliath when it comes to taking on its neighbors.