There are two major problems when comparing these: 1. Israel wasn't formed organically, they first had to get rid of the hundreds of thousands of pesky Palesti

There are two major problems when comparing these: 1. Israel wasn't formed organically, they first had to get rid of the hundreds of thousands of pesky Palestinians living in Palestine for a few hundred years. The Japanese didn't take over a, say, Chinese island and settle there (though they tried in Manchuria during WWII). 2. None of the other states you mention has anything resembling the ethno-state character of Israel. There is nothing in the Italian constitution that is even slightly aimed at making sure a non-Italian can't become president (even if not explicitly prohibiting it)[0]. Italy doesn't recognize the right of ethnic Italians to automatically become citizens by moving to Italy. [0] though it's rare, there are well known cases of nation states having presidents of minority ethnicity. For example, right now in the middle of war, the president of Ukraine is himself Jewish. Also right now, Klaus Iohannis, of German ethnicity, is president of Romania. Peru has had an ethnically Japanese president (Alberto Fujimori) and more recently the son of an Austrian immigrant.