There is no rational answer, the only non-rational answer I use is: We have the right to own guns, We have the right to kill people, We have the right to face our actions in a court of law, this is all that I can come up with.  Money talks louder, this could be called a rational answer.  Truthfully I'm numb to it all, it is happening so much, no solution, excuses to why the individual did it, excuses, excuses.   Be numb and move on with life.