reasons people participate in horrific events.
1.  often times the person is just sticking up for what they believe in
2. sometimes people do it because they feel obligated to
3. maybe something happened and they feel its the only way to fix it
4. brain wash in young children(Hitler youth)
5. racism
6. pleasure
7. power
8. revenge
9. avenge
10. threats of violence
    overall there are many reasons why people participate, but generally its because they feel it is necessary to get a point across, and let there opinion be heard. it is an instinct to feel that no one should go through something if you don't have to. also, there is a strong greed for power among people. everyone wants to be feared so they can manipulate the weak.