If he invades Syria, then I think his Nobel prize should be rescinded. As for US relationship with Al Qaeda? It goes back a long way, as does the US relationship with the Taliban. It appears that America calls them "freedom fighters" or "terrorists" - depending on the situation.
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For example, this photo from the early 1990's depicts Osama Bin Laden as "warrior for peace" following the end of the Soviet/Afghan war. Taliban were "freedom fighters" when they were killing Russians. Then, after 9/11 they became "terrorists" because they killed Americans.
In my view, they were always terrorists. And most Americans do not seem to understand that the Soviets were *invited* by the Afghan government to put down an insurrection. They think that the Soviets "invaded" Afghanistan, which is patently not true.