Did you claim every country has a right to exist? Nations fall and rise. You even mentioned territorial borders and government.
You have provided no reason for us to believe that Israel has the “right to exist.” One could argue that countries don’t actually exist and are just a mental construct.
You have failed to prove the definition of right to exist, that the people of Israel “are willing to sacrifice their own interests for the community it represents.”
All you have done is show that nations have certain rights and that the “right to exist” is a philosophical and not a legal issue. This is very ironic since you were the one who opened with the legality of Israel and then you say that I can’t use legality to defeat you. You still provide no philosophical reasons. You have the burden of proof, and you have provided none.
“And the Lord God gave to Israel all the land that he had sworn to give to their fathers: and they possessed it and dwelt in it. And he gave them peace from all nations round about: and none of their enemies durst stand against them, but were brought under their dominion. Not so much as one word, which he had promised to perform unto them, was made void, but all came to pass. (Joshua 21:43-45)
“For the Lord hath mingled for you the spirit of a deep sleep, he will shut up your eyes, he will cover your prophets and princes, that see visions.” (Isaiah 29:10)
“And seeing a certain fig tree by the way side, he came to it, and found nothing on it but leaves only, and he saith to it: May no fruit grow on thee henceforward for ever. And immediately the fig tree withered away” (Matthew 21:19)
And they also, if they abide not still in unbelief, shall be grafted in: for God is able to graft them in again. For if thou wert cut out of the wild olive tree, which is natural to thee; and, contrary to nature, were grafted into the good olive tree; how much more shall they that are the natural branches, be grafted into their own olive tree? For I would not have you ignorant, brethren, of this mystery, (lest you should be wise in your own conceits), that blindness in part has happened in Israel, until the fulness of the Gentiles should come in. (Romans 11:23-25)