Why would God murder oklahoma elementary school kids?

The flip side of the standard evangelical assertion that "god is in control" of everything is that he would have to be responsible when things go wrong, like when tornados rip through oklahoma city and kill dozens of children at their elementary school.  See, it doesn't work to say that it's just a natural disaster that is out of God's hands if he created the universe and everything in it, and constantly pulls strings to influence other minute details, like whether you get a parking space at the mall.  Furthermore, the standard "free will" excuse doesn't work too well with children in an elementary school in the suburbs of "God-fearing" Oklahoma City.  And the notion that god purposely created the tragedy to allow "greater good" to come through the rescue efforts, etc would be like excusing a mass-murderer like Adam Lanza, on the grounds that good things might ultimately result from his act of evil.