Why are some people so evil and mean?

people can be evil for lots of reasons. its their buisness why they are like that,you can't make them be nice. they''ll look at you strange or nasty. that's the devil who works inside you. people who are evil seem to have no life what so ever they stay their whole life mad at themselves,that's why it's good to find out about people so you won't jump in the wrong car.