Why US is nervous

"But it is harder for U.S. officials to accept the way Erdogan has escalated his conditions for normalizing relations with Israel, now demanding an end to the blockade of Gaza as well as a formal apology for the deaths of the Turkish citizens. U.S. officials are nervous about what they see as a populist campaign to build an international reputation on the back of anti-Israel rhetoric.  Already considered the most popular politician in the Arab world, Erdogan thrilled crowds last month during a trip to Egypt, Tunisia and Libya when he complained that Israel was "the West's spoiled child.""