If you can see any hate in that song I think you must have brought it with you.

The one thing this song isn't is a finger-pointing song. mg looked at something tragic that has happened and is still happening and was moved to write a song that responded to the reality of the suffering, and didn't even try to go into the whys and the wherefores. If it had been about the tsunami would you complain that it didn't go into the ins and outs of why earthquakes happen or discuss the inadequacies of early warning systems?   

There's a time and a place for arguing about why awful things happen, and there's a time for just recognising the tragedy, and seeking to help undo some of the hurt: :

Young women of the world attend and hear my solemn vow
I'll help you in your trials to come if you will help us now
Wherever people suffer they will not be alone
And I the Flower of Lebanon will make this cause my own.

"This cause" pretty evidently being helping relieve suffering wherever it may have happened and whatever the reasons it happened.