Please do keep in mind that other countries have influence in the region too. It is a complex interplay that makes up the situation in the Middle East today.
Here is their influence in the region.
"US, Saudi Arabia,and Israel have conspired to destroy Syria by way of arming sectarian extremists since 2007":
» World Must Unite Against US-Saudi-Israeli Proxy War in Syria Alex Jones' Infowars: There's a war on for your mind!
Wikileaks: Saudis 'chief funders of al-Qaeda' - Telegraph
WikiLeaks: Saudis Largest Source of Terror Funds - CBS News
Saudi king urged US to attack Iran: WikiLeaks - ABC News (Australian Broadcasting Corporation)
Time to End Western Support for Terrorists in Syria: “Opposition” is Entirely Run by Al Qaeda | Global Research