My question to David Cameron via PMQs

Probably won't go through but you never know!:

 'One of the justifications for the opposition of the British Government to the Assad regime is that he is a 'butcher' because he supposedly committed a Sarin gas attack on his own people in Damascus on 21st August 2013.

Since then, this story has been conclusively proven to not be true, partly because there were only two potential places rockets could have come from and the only one that had Sarin residue which did not have the required range.

Neither the Obama administration or British intelligence have offered conclusive evidence to this fact, so could Mr. Cameron justify on what basis he wishes to replace the democratically elected government of the Assad regime. Whom seems to have done nothing but defend his people from Da'esh.'