Gas or not, it still doesn't excuse Assad for bombing his own people. I think people are spelling his name wrong, in English it's spelled Ass.
If you did not notice, Syria has been in civil war for the past six years with west supported jihadists, including Al-Queda. So called Islamic State then filled power vacuum in much of used to be eastern Syria along Euphrates river.
I failed to notice some LGBT, prowestern democratic authority among so called rebels, but I am sure you can name many.
Or perhaps you would like Syria to become failed state like Lybia after NATO bombings?
Somebody has to clean it up this mess.