Not just that, Assad is waging a war against his own population with ALL possible means, chemical weapons are just a 'new' way of killing them off. There's tons of evidence that the syrian army did indeed use those weapons.
Let me get involved in this, but try to talk my words with a truck load of salt, not just a pinch
Okay, Assad was winning the war with conventional weapons, the over year long war was coming to a close and the rebels where on their last string... Fact of the matter is, Assad was kicking butt... Some serious butt.... It is funny how every documentary that came out of Syria about the war even stated, the rebels were loosing... Even documentary's from the propaganda machine... But the second those chemical weapons drop, the whole world switched the facts and said Assad was loosing badly...
When you look at Assad's reign you can see he was a secularist... He stopped the Islamic faith of basically enslaving the Khafir's... You can see nearly every religious and non-religious person absolutely liked Assad's reign... The only group who largely apposed was the Islamic people... So which people do you think started the FSA and are now running the FSA... Given he was a dictator so some other peoples beside the Islamic dislike him too. However, most were glad of his political stance stopped their oppression from the Islamic.
Okay so the war is coming to a close and the UN is starting to come into the nation to help with refugees and what not... All of a sudden when Assad is winning the war with conventional weapons and the UN just came into the country... You think Assad is stupid enough to launch a Chemical weapon onto his own populous which he already controlled? I believe he is smart enough to understand what happened to Iraq, Libya, and Egypt... Why would a man who is about to win a war, and has the UNITED NATIONS in his country... Want to create attention? Why would he want the world looking down on him... And every country we have 'helped' in this millennium we overthrow their govt, and place one that we like... I think this is very apparent for countries in that region to know, you get the U.S.'s attention you no longer rule your country... Why would Assad basically dethrone his own rule when he is about to win a war!...
Okay not only that but the UN was directed not to search for the cause of the chemical attack but only the evidence... So to say there is overwhelming evidence Assad did it is just a theory at best... Since there is no proof and never will be any...
Also you can see through documentaries and reports, that the United States has been giving the FSA (rebels) arms to fight Asasad... You can we we are investing tons of resources into Al Queada in hopes they will win in Syria, yet we are fighting them in Afghanistan... Sounds to me that we are willing to SUPPLY OUR OWN ENEMY WITH WEAPONS, just to overthrow someone... I would not hold a chemical attack above the FSA or the United States... What caused the Vietnam war... I pray for Syria because we have increased the length of a war that was nearly over...