Not that I want you to move hun
but you shouldn't let something like this alter your chosen path in life. The world is a dangerous place. We have had our own problems with violence in our own little country, although not in schools.
I remember once in work after a guy was killed in an accident in a neighbouring firm, a hard-nosed sales manager said "there's nothing sadder than a man going out to work in the morning and not coming home". Well I guess he was wrong....when it comes to childern going to school in the morning and not returning home.