I'm sympathetic towards anyone who is murdered.
You should probably sympathize with the living, not the dead. But I get what you mean.
Honestly the best we could do is offer asylum to any Syrian Christians who want to flee... offer them safe harbor until things settle down. Any more involvement from the U.S. is probably about as effective as shoving your bare hand into a fire ant mound.
I'd support offering asylum to those in danger. We could set up tents in the great plains and provide internet access so that they could apply for jobs here. Maybe they'd stay?