U.S. won't back Egypt's attacks on ISIS for some reason

“We are neither condemning nor condoning” the Egyptian strikes, is all one U.S. official would tell The Daily Beast.

In other words, these once-close nations are now fighting separate campaigns against their mutual foe. And that could prove to be very good news for ISIS. The rift between U.S. and the region’s most populous country portends of another division that ISIS could exploit, this time for its expansion into northern Africa and the broader Middle East.
U.S. officials privately said they do not have a better idea for confronting the threat and the ongoing strains between the two nations has led to a breakdown of trust.

“The Egyptian military, in particular, is very frustrated with us,” one U.S. government official explained to The Daily Beast. “It is mutual frustration.”