"Silence in the face of evil is itself evil . . .
Not to speak is to speak
Not to act is to act"
Dietrich Bonhoeffer (1906 Poland - 1945 Germany)
It appears to be the case that Tony Blair wants to go to Syria as some kind of peacemaker and that he has gone to Washington to get his official pass stamped.
It won't be easy for Blair to undo the multiple Gordian knots. Perhaps impossible. They may have to be cut. But it's a try.
Here's one end of the string: Who was behind the Syrian 2011 protest movement?