The U.S. should call of strikes in Syria. There is no reason to strike Syria period. We do not know if they set these weapons off on their own people intentionally. It could have also just been an accident. We should stay out of their fight and let them sort it out.
The US should not be threatening the Syrian government prematurely. There is still no evidence of which side used chemical weapons, only the fact that they were used. There is the inherently dumb idea that the weapons could only have been used by the Assad regime. However whether by corruption or otherwise it is possible that the weapons were release intentionally or accidentally, on their own people. Look at the way everyone reacted and you have your answer as to why the rebels would have done this. The US should not strike Syria, period.