If Israel declares what is Israel, no one will accept it. They could give up everything but 1 square mile and as long as there was a single Jew still living there, it would not be enough for the arabs. And if it isn’t enough for the arabs, it will not be enough for the world.
The whole thing is to rid the region of JEWS. Remember what the place that is NOW Israel was like when they first returned after the war. It was barren and desolate. And that is what it would be again.
Everything Israel has conceded has reverted to the stone age. Israel made the Land green. The arabs have made it rubble.
I suspect the US and Euros would accept something resembling the 2000 or 2008 maps. Continued negotiation won’t result in anything better, likely worse, and Barak is correct, the status quo probably won’t last another 2 decades