Health: Karka Einah Nigzeles. The Goyim never had the R’shus to become Ba’alim on it. (And even if you Pasken Yeish Kinyan L’AKU”M L’hafkia…, they still can’t actually own the land. Eretz Yisrael belongs to the Jews L’olam Va’ed.) Whether or not making a State was Assur, you can’t fix that by being Over on another Issur D’oraisa.
And you can’t know that it would be Pikuach Nefesh to give up Israel. It might be. Or it might be worse. But I don’t think that your assumption about what world terror organizations would be satisfied with even creates a Safek Pikuach Nefesh to get out of this Issur D’oraisa.
(I could also make the claim that this Issur is Yeihareg V’al Ya’avor because it’s related to Avodah Zarah and because the Passuk directly implies it, but I’m really not in the mood to discuss that at the moment.)