Why would aliens visit such a violent species? Thats obviously a big potential reason. They have a better view of us that we do. They see one part of the world fairly advanced with a population of people who are most concerned about getting laid and their phones. They go to another part and then they see people living in huts, primitive, starving ect. Then to another part and they see us trying to kill each other...they see us trying to kill each other quite a lot, in all parts of the world. Looking down at us, we probably do not appear nearly as advanced as we like to think we are.