Why do we like stereotyping?

Liberty has dawned upon many societies but there are always restrictions. Free thinking abstains from such stereotypes. Free thinking is when you do not judge people before you meet them. Even after meeting people a hundred times, it is difficult to judge them – they may have certain dominant traits that they may show you – but how these can be generalized into a universal law of personal hatred and biases is surprising. Can I explain this using survival of the fittest? Or is it historical factors that our fathers have witnessed that have placed biases in the minds of the people? How does it matter if I call my God Allah and the other Christ? Try to take out differences so that our religion may look bigger better and more sophisticated than other religion or our colour looks better. My Hindi teacher once said that Indians were special because they were the only race whose colour was the colour of the soil. What soil is he talking about? The soil on the beach is white…there is black soil too and yellow soil….And even if it is so, how does that make one special? If there were green people would they become special because they were the colour of grass and trees? Self justification and persistence of these biases lies underneath the so-called rational thinking of so-called free thinkers. Why can’t people let people be? Why do we need to impose our forefathers thoughts on rational minds? When shall we become enlightened?