The U.S. is not so much ignoring the Arab Spring (since it cannot be ignored), but viewing it in the larger context — i.e., our Cold-Hot War with the Islamic Republic of Iran from 1979 to the present. As one U.S. official told the WSJ when asked how arms sales to the U.S.'s Arab allies were being impacted by domestic unrest, the response was "We in the military are poised to get back to normalcy," i.e., arms sales that send a clear message to Iran (ironically, when Warren G. Harding first used that word in 1920, it was followed up by a major reduction of the U.S. armed forces' strength).
"The Pentagon is considering a significant sale of [4,900] Joint Direct Attack Munitions [JDAMs] made by Boeing Co, adding to other recent arms deals with the UAE. These include the sale of 500 Hellfire air-to-surface missiles about which U.S. lawmakers were notified in September."
"The sale of Boeing-built "bunker-buster" bombs and other munitions to UAE, a key Gulf ally, is part of an ongoing U.S. effort to build a regional coalition to counter Iran."