Apparently you're unaware of the fact that those who have opposed Israel consider the U.S. to be the worst of the two, and this actually has only a bit to do with our support for Israel. To so many in that area of the world, the belief is that the only reason why Americans are so interested to the point for us to get involved is because of one word: oil. And frankly, I can't blame them for being upset with us as this is actually quite true.
If you actually spend time in the Middle East, you can understand why there's such a dichotomy with how so many there view America. Some feel were just greedy jerks and some others admire America because of its freedom and wealth. Some love democracy and modernization, while some others more value tradition and distrust democracy.
Since Israel and the U.S. so much rely on each other, and since Israeli interests are very often our interests, for us to abandon Israel, our closest ally there, would be outrageously stupid because since when have isolationism solved much of anything? If we need to intervene, we need allies there. Some of our technology is from Israel, such as the new ground-to-ground missile that's involved in anti-tank warfare that was developed by the Israelis. Our Patriot missile system uses joint Israeli-American technology. The Intel facility there is unbelievable. Etc.
To abandon an ally like that would send shock waves towards our other allies in that how much can they rely on being partners with America? We promised that we would help defend Israel back when the U.N. partition was decided upon, so now we are going to ignore that? And what about all the Americans that spend so much time in Israel to the point whereas you hear English there all the time?
You may want isolationism because your money is far too important for you to spend that 1/2 of 1% on foreign aid, but I prefer to keep friends and allies in various parts of the world.
So, believe in what you want to believe, but I simply do not agree with your approach.