USA’s support for Israel has been largely illusory. Carter gave us an Islamic Iran and tried very hard to give Israel to Arafat, as did Clinton and GW and now Obama. Now Obama wants to allow Iran to build Nukes. (Personally I would be shocked if they did not already have them)
Well, I guess we could go around and around as to whether the USA has been critical or not to Israel’s survival. But, there will come a time when Israel won’t have the USA’s support ... and then we’ll see exactly what will happen to Israel. That day is coming soon.
The USA no longer offers much in the way of foreign aid or military aid to israel, but we have maintained the Most Favored Nation status in trade with israel which is worth about $30 billion in trade, or 10% of their GDP. That's very important support. Our strategic treaties are also a back prop to their security. . . but under Obama, they are worth about as much as so much used toilet paper to any of our treaty partners any more. Israel knows this. . . but they have made themselves somewhat indispensable to the US in some strategic arms they sell to US. . . so the Most Favored Nation status is pretty safe for now.