I find it amazing that anyone believed that the border would be calm and under control. From the 1st day when thousands went through the border, to when the UN officials ran for their lives. While Egypt bans the Muslim Brotherhood in its country it helps their child Hamas (part of the Muslim Brotherhood). The Egyptians seem to be supporting their enemy. Its is Israel's fault for giving into US pressure to leave the border in the 1st place but the Egyptians have done nothing to live up to their promise of helping Israel with the other side of the border. None can blame Israel for Egypt lying and trying to help an enemy of the Western world. This realized it makes sense for the US to be pissed off at Egypt.
Justice Ministry: Information examined by AG about Gal Hirsch didn't come from police (Haaretz)
from the article: Egypt FM: Pro-Israeli lobby is harming our relations with U.S.