Why do we have such a difficult time understanding viewpoints that are different from ours?

Certain people only grow up seeing one perspective, and if u grow up in an environment like that it can effect how u treat people with different beliefs and viewpoints. These people have gone their whole life learning only one viewpoint which makes it very challenging for them understand because they feel that they have to throw away every thing they learned when in reality they just have to be open minded and respectful.

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A.children playing educational games