Not stopping genocide is morally questionable too. And that's what Assad and IS have been doing.
Unfortunately trying to stop genocide with violence and failing miserably is even more wrong. On the other hand using supposed genocide as excuse to forward geopolitical interests would also be wrong.
Given how Vietnam, Afghanistan, or Iraq wars have turned out, I'm not in favor of meddling. Given how nobody gave single fuck about Khmer rouge, I don't believe in genuine good will in geopolitics. So I'm not giving my permission to anybody to conduct air strikes in Syria, but they won't ask me either. Only air strike that gets my approval is dropping several tonnes of polyurethane to Dabiq.
http://www.theatlantic.com/magazine/archive/2015/03/what-isi...