Perhaps you didn't get the memo? The refugee relocation push in the U.S. is a $10 BILLION dollar taxpayer funded industry. If you cut off the U.S. resettlement, you cut off the paychecks to a lot of people who have lobbyists in DC.
That's a symptom, not a cause. The cause is that egalitarian Syrian Alawites control the country and protect the Christians, Kurds and Druids. The rest are predominantly Sunni (about 65%) and want to establish a Caliphate to unseat the Alawites (a Shia sect), eliminate the Kurds, convert or kill many of the Christians and place the rest in dhimmitude.
One thing that should be pointed out is that the Alawite controlled government of Syria, actually utilizes a lot of geopolitically aligned Sunni leaders. They will also be killed by IS and the al Nusra Front, should they fail to maintain control. The reason Hezbollah (Shia) is fighting for Assad has as much to do with continued support as the Shia connection. If Assad fails, Hamas will likely destroy Hezbollah.
The Assad regime is truly a secular dictatorship. He's willing to overlook religious lines if it suits his purposes. He's brutal and doesn't hesitate to kill or subjugate his people. IS and the al Nusra Front are equally brutal, if not more so. The Christians, non-egalitarian Alawites and Kurds will be the biggest losers if the Sunni win. It will be genocide.
Assad's barrel bombs are merely a poor man's napalm and cluster munitions. They're significantly less effective if you put pen to paper. It shouldn't even register as a blip on the list of evil **** happening in Syria.
