The answer is none..... In a zero sum world....the intervention benefits no one but it must be done to prevent future attacks. It is a loos for everyone , but another attack could be in your neighborhood, and unfortunately a limited strike degrading Assads forces is needed.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: Syrian rebel to Haaretz: U.S. mustn't turn Syria into another Iraq