Newtown Connecticut

Today my heart truly bleeds. I live in Michigan. Geographically, I am far from the tragedy that is unfolding at this moment in Newtown Connecticut where a gunman has attacked an elementary school, but spiritually speaking...I am there. The news hasn't been fully reported yet, so I won't attempt to give any details or statistics. I just can't understand what makes a human being act so violently against other human beings, not to mention how disturbing it is when that 'animal' murders a classroom of innocent children. What causes a person to have no respect for life... be it the life of others or their own?