Categorising world and people into different pockets is one of the major drawbacks in the blueprint of the human thinking process. What is required to be appreciated is the diversity one can enjoy while sustaining the torturous game of life. Obviously it's not feasible to say that everyone would echo everyone else in actions or thoughts, but what can also not be concluded is not everyone dislikes or hates everyone else. Categorising people had not been a human trait till Eve learnt shame and understood the difference of genders after eating the red fruit. But the trait, when gifted to humans was overused and overplayed along with the passage of time. We learnt the filter of caste, the filter of color and not to forget filter of intelligence. If you separate yourself from people due to your unmatchable mental capabilities, it is okay. On these terms, disliking or hating someone or even saying that they aren't good enough is inhuman. Learning to accept diversity is the sole purpose of your basic education. You need to understand that accepting diversity is not to gel with every variation in the DNA; rather it is to accept and respect their variations and not to violate and suppress them.