I highly doubt Israel would have our backs absolutely in any sort of attack. I can see them worming their way into an alliance with another nation in order to get another "pet attack dog" if they could see it as being advantageous. Israel would not do half of what it has been doing if it didn't have the 100% unquestioned backing of the US and I think many of Israel's policies do its citizenry a great disservice. Afterall, it IS the normal citizens that are most at risk from suicide bombers, assaults, and violent anti-semitism. I always thought an alliance between nations were supposed to have mutual benefits to each other, or at least an alliance based generally upon shared values, culture, and religion. Whatever advantages an alliance with Israel has given us, it certainly is lopsided comparitively to what the US has been to Israel. As for the shared backgrounds I would think we have more in common with the UK, Germany, France, Spain, and Australia. I guess the Israeli lobbying machine, the Israel-first politicians in our government, and the power of the Evangelical lobby is simply too much to overcome.