I would say the answer is prejudice. B/c stereotypes are thoughts that someone has based on different things they hear or see (may or may not be factual), whereas, prejudice is an opinion people have for different things (and this could be based on stereotypes they observe).
This particular example could be Prejudice because it shows that passenger is probably scared of muslim passenger (islamophobia) as the stereotypes surrounding the religion have been widely spread in media.
