Countries back radical groups all the time. The "reasons" for Al Qaeda turning back on the US were: 1) support for the existence of Israel: just the idea of it

Countries back radical groups all the time. The "reasons" for Al Qaeda turning back on the US were: 1) support for the existence of Israel: just the idea of it, not necessarily the finer points, like whether it should coexist with an Arab Palestinian state. Zionism, whether it meant only taking up part of what was Mandatory Palestine, or all of it, flew directly in the face of the idea of pan-Arabism and Islamic theocratic chauvinism. 2) the Saudi royal family's request that the US-led coalition defend Saudi Arabia during the Persian Gulf War - that was something that Usama bin Laden really hated, as he thought that it should be on the Saudis themselves and Islam as a whole to defend its birthplace, not some Western power.