Singling out people of certain religious denominations only provides additional material that could be used for propaganda purposes by "the bad guys" (ISIS, Al-Qaeda, etc). Example scenario: you are a Syrian child of Islamic faith. Your country is being destroyed due to heavy involvement of outside influences (one of them being the US). Due to your country being ravaged and (possibly) family members being killed, you seek refuge in the US. However, you are unable to enter the US due to security concerns, while your neighbors are being let in to the US because they are Christian. Meanwhile, there is another organization (ISIS) that is claiming to take back your homeland (Syria) in the name of Islam, while also denouncing the US as an anti-Islamic enemy of the State. Which group would you then try to join/support: the country (US) that supported the destruction of your country and then denied you refuge due to your religious identity, or the organization that (claims to) accept you and all true Muslims that want to re-take control of their homeland? I know that if I were the Islamic child in question, ISIS may definitely seem like a viable option at that point. As such, we (the US) NEED to be actively trying to assist/help all refugees from the Syrian conflict, not just the Yazidis and Christians. If we are to truly be "the good guys," then we need to start acting like it.