How do you explain to your small children that there is so much hate in the world?

Why is there so much hate in you that you have to explain this to your kids? Learn to forgive and forget. If somebody has done something wrong to you, then stay away from the person. Don't dwell on the unhappy stuff. Instead, focus on how you can improve your life better to make you a happier person. In this way, you will bring up happier kids. Otherwise, this whole thing about hate in the world will continue to be a visious cycle and be passed on to the next generation. Hope you will find your inner peace some day...