Social behavior and triggers kids to burn down schools and classmate and stff

The course work should be a response to the question or statement below.And must be a minnimum of 200 words.

We have discussed behavior and how it can be shaped by society, our environment, family and friends. The past couple of years and as recent as Tuesday, we have seen where students are going into schools and opening fire on classmates and staff. What do you feel could be triggering this type of behavior?