for two reasons. A last ditched attempt to stall the peace process for at least the rest of Barack Hussein Obama's tenure in The White House. Netanyahu is also unhappy as it appears that The White House has admitted defeat in the imposition of further meaningful sanctions against Iran. As Emanuel is Jewish it would appear that Israeli politicians and Netanyahu in particular that he has refused to say how high despite being asked to jump.
from the article: U.S.: Emanuel 'didn't threaten to walk away' from Mideast peace process