I know this as well but the government and those who advise the government (Brookings) cling to their lies in order to justify their actions. They can't tell the people outright that they are supporting terrorism in Syria. And the people, by and large, lack the intellectual honesty to admit it so they are willing to accept the government lies.
But what can they tell the people after they have created a terror state in Syria?
Again, the government is not admitting to, and the media is not pointing out, any role for the turmoil in Syria. The people don't acknowledge it,they accept the lies, so there is nothing to explain. When it is discussed it is usually on the level of partisan politics.