Moral high ground isn't quite the right word, it's just a cultural imperative. Israelis are a lot more like us than anyone around them is, but it's a huge mistake to believe they think the same way or have identical values.
Meh. I liken it to the same "cultural imperative" that the U.S. Marines have -- leave nobody behind. I don't think anybody's comparing the U.S. culture to that of Israel's or even asserting identical values..
I would argue, however, that when one sticks to one's guns vis a vis leaving nobody behind, that's adopting a pretty high plateau compared to the muzzies.
And the muzzies are going to take advantage of it, to the detriment of the Israelis themselves.