It has a series of Basic Laws that serve that function (they are expressly a solution to the failure initially to pass a Constitution and are intended to be compiled once complete into a Constitution), but while some of them are problematic on grounds that touch on the Israel-Palestine conflict, I don't think any of them call for the destruction of Palestine (which isn't to say that most Israeli leaders since Israeli occupied the West Bank and Gaza haven't done something like that, but that's a different issue than the Basic Laws doing it.)