Religion is useless. Countries all over the world are prejudice against other religions. It is also the same with government ideas on economy and gay rights. In Persepolis, these two issues come up.

In Persepolis, at the beginning of the book, a fundamentalist man was saying that bilingual schools had to be closed down because "they are symbols of capitalism". But later in the book, it speaks of how Marji's grandfather became a communist and he was tortured.
Since capitalism is religious compared to communism and Iran was religious, I think that's probably why they prosecuted communists. Even though people have different views, it's not that bad.

Marji's family's friends were whipped because they were homosexuals. Even though the government can't do that here, lots of people still use hate crimes towards gays, like in the short story Am I Blue?

People shouldn't hate on people just because of differences. Imagine if everyone had blond hair, blue eyes, were all obese and everyone's name Frank. There would be no differences between anyone and nobody would no anybody. It's also like this with school uniforms, I think, to make it be as if everyone's equal.