Supergirl - English

I English we have been watching Supergirl and trying to understand how it correlates to the real world. In Supergirl, there are aliens and those aliens are treated like immigrants (which is weird because sometimes immigrants are referred to as aliens). We were asked to write a paragraph and here it is

Supergirl, Welcome to Earth carries many messages about Racism, Sexism and many other isms. Although fictitious it suggests a lot about the current world and how every corner you turn they WILL a person who has different views and they will most likely be extreme.

Thanks for reading and please comment as it really helps my learning