Saudi Arabia's new "Anti-Terrorist" Alliance looks more Anti-Shia to me

Saudi Arabia has just concluded a treaty that brings together a number of Muslim nations in an "Anti-Terrorist" alliance, their definition.  While it purports to be anti ISIS, it doesn't really look that way at all.
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The alliance is of mainly Sunni Muslim nations.  And, it doesn't include the biggest enemies of ISIS, Syria, Iraq and Iran.  It look less like an Anti-Terrorist and more like an Anti-Iran military alliance.  And while that is completely the Saudi's right - to build an alliance of like minded nations, we who are fighting ISIS should understand that the majority of ISIS funding is coming from Saudi Arabia and other Sunni nations.
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ISIS is a Sunni lead terrorist backlash against the aggressive and deadly Shia regimes, particularly Syria and Iraq.  Without at least the tolerance of Sunni nations, the ISIS cause would have been lost long ago.
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There is no great answer here.