For example the Lebanese Civil War was a war between two different culturally different people. The main thing that was different about them was religion
There was a famous Icelandic poet named Passion Hymns, his works would be inspired by the bible. So his poems were only easy to relate if you knew what the characters are feeling.
Literature can create strong society's, let's take the US for example, we have a wide variety of literature. Most teenagers read book about being different and sticking out from the rest. That is how our young population is thinking differently to outperform others
If a culture wants to discriminate against another culture, then it will be like dominos, once it starts it is hard to stop. And don't thinks that the other culture won't fight back, they will try and insult you back.