Well since American forces killed many innocent people, we could just bomb your country to the ground, kill your wives and family and say it was justice because your Leaders are killing their own people (death penalty) and we have to liberate you.
We could say that you have no rights because you posses weapons of mass destruction and won't hand them over to us.
You also attacked many states and so you are a danger to the stability of world peace.
And we also have proof for that.
But we will not do it, because it won't solve our problems. Invading countries for absolutly no reason is just nonsense.
Saddam Hussein was one of the first leaders, who spoke his condolencies for the victims of the 11.9 attacks. There is no connection between Al Quaida and Iraq.
Al Quaida would want the US to attack Iraq because they hate Saddam.