It's doubtful these people owned any property. They have been living off the teat of the U.N. in refugee camps. War and fundamental nutty stuff is all they know or live for. Remember, it's one of the reasons they hate us and the West, what they perceive as our materialism and secular way of life. They aren't real big on acquiring property or "things." There will be nothing to return to them.
To the extent that there are exceptions who do own property/possessions then the right thing to do is to return them once the crisis is over. Would you accept that?