Who cares about the civilian casualties in Syria? Clearly not Assad who wants to retain power; nor Russia, Syria’s long time ally; nor Turkey, why?
Erdogan is power crazy and dangerous; nor Iran which finances Hezbollah.
Unthinkable why Obama and others have trusted the Iranians.
It is, unfortunately, true that it is much easier to stay aloof than get involved. But in the end we have to. Syria has an important place in the biblical/historical/architectural world. Syria has collapsed. Millions of generally innocent civilians have been displaced. They have become refugees.
And as refugees, they have inevitably disrupted communities, particularly throughout Western Europe. Do you imagine that the long term solution can be satisfactorily reached without resurrecting Syria and Syrian life?
The cost of that resurrection will include the displacement of the Assad regime and the determination to sideline Russian support for that evil regime. Obama wouldn’t have done it. Will Trump have the political will and skill to follow that goal?