The truth is that killing innocent people is always wrong - and no argument or excuse, no matter how deeply believed, can ever make it right. No religion on earth condones the killing of innocent people; no faith tradition tolerates the random killing of our brothers and sisters on this earth.
Carry out a random act of kindness, with no expectation of reward, safe in the knowledge that one day someone might do the same for you.
I actually think that the most efficacious way of making a difference is to lead by example, and doing random acts of kindness is setting a very good example of how to behave in the world.
I like to do chill things on dates. I think it would be fun to go to the zoo. I know it's really weird and random, but I love animals. It'd be like a day of doing silly things, while enjoying nature.
In all natural disasters through time, man needs to attach meaning to tragedy, no matter how random and inexplicable the event is.