why racism

Today , we find in this scintific era that somany people are fighting due to racism . I cant understand the mentallity of these people because most of these people are from educated families and from young generetion.These are specially students. If we will talk to them then we will find that each of them is in the favour of intercast marriage social globalization & against castism . Evan then they are doing all this stupid things. In my childhood I find dogs to bark at a dog of another racis. I wanna ask to these educated person are we dogs ?At one side we are thinking about world globalization on the other hand we are promoting these unhealthy habbits in the society . The people who are promoting these bad habbits are mostly from young generation who is either educated or famous. Youngesters are promoting it just to satiesfy their ego in anger . they should keep only one thing in the mind that this time is of world globalization where we should promote humanism otherwise our next generation will abuse us to promote these kind of unhealthy habbits in the society.