"Abrahams Lincoln"

So I learned from Ashlyn that today is "Abrahams" Lincoln's birthday.  She kept telling me he "got shoot" but she doesn't know why anyone would want to shoot someone else.  She asked if he was being mean?  How do you explain why a President gets assassinated to a 4 year old?  Well, how do you explain why anyone would shoot someone?

http://www.youtube.com/watch?v=tgnsCo5uWVM