This is not negotiable. Palestine does not get its legitimacy from neither Israel nor the USA. Its borders are defined by UN resolution no 181 of 29th Nov 1947, the same resolution on which Israel based its independence and borders. If you don't believe this, you can refer to the Truman Library archives.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: Israel: Palestinian UNESCO bid is rejection of negotiations