Man, if “leave” is an option, I’d get the heck out of there.
It's likely "leave" is not an viable option for many. This is a war zone and mobility for civilians is restricted and the FSA is hostile to Christians. Even if one could safely get to the border of Syria, all the countries surrounding it are Muslim except Israel - and it is likely their border is closed. On some borders they might be welcomed, somewhat, if they can get there.
There are are about 2 million Christians, and that is a huge exodus. Such a movement is unlikely to happen either easily or peacefully in that war torn country and especially because the FSA will be more than happy to kill them for Allah.
The Christians are screwed. Some will be lucky and get out. The rest will probably be either converted or killed in this Muslim madhouse. Unlike the Kurds in Iraq, our government is unlikely to help the Christians much as our good buddies are the radical Muslim FSA.
Ethnic cleansing is on the way and it will be aided and abetted by the United States and the UN.