First have them declare Israel’s right to exist and see how far that gets you.
Actually ... that is the very least of Israel’s concerns. I don’t know of any country that has demanded of another, some signed statement or agreement of their “right to exist” ... :-) ... perhaps there is one out there somewhere, but what countries do is simply “defend themselves”.
If Israel comes to an agreement there will be concerns that it has which are very much higher on the list. Netanyahu has outlined those concerns before.
Lets remember PLO walked out of PP, just after they got their murders sprung from Israeli jails, without any concessions
Then Abbas went and joined all those organizations as a state against the rules of the PP. obstacle one
Then Abbas joined with Hamas, both never changed their charter, and by joining Hamas they became an accessory to the illegal missile attacks on Israeli civilians Obstacle 2
Then Abbas wanted to sue Israel soldiers in ICC and of course Israel’s leaders, lets remember at the same time they were stabbing Israelis and running them over with cars this fall.
See you in court Abbas, meanwhile lets all call on our congress to cut off all their US aid.