I didn't say that Assad did it, but it is true that he is still actively trying to quash the opposition (even though he is winning at this time).  What I said is accurate about a theoretical motive, if he did it.  

I did not comment on whether I believe he did it or not, so I will here.  I think it unlikely that he did this.  It is possible, but I think that there are more likely theories of others having done this to make him look bad and try to turn world opinion against him.