<prompt> Translate the following text to EnglishIslamabad, Riyadh na kwa upanuzi, Washington bado inaweza kuja kujuta msaada wao wa ripoti kwa harakati ya Sunni ambayo inaonekana sasa inazidi Shia Iran katika bidii yake ya msingi na rufaa ya uwezekano kwa wakazi wa Sunni wasio na furaha.  <response>: Islamabad, Riyadh and, by extension, Washington may yet come to regret their reported support for a Sunni movement that apparently now exceeds Shiah Iran in its fundamentalist zeal and potential appeal to discontented Sunni populations. 