Okay kiddo, have you ever heard of Lehava? It's actually an acronym that stands for "Preventing Assimilation in the Holy Land." Basically, it's a group of people who believe that Jewish people should only marry other Jewish people and not people from different religions or cultures.
They think that when Jewish people marry outside of their faith, it can weaken their connection to their Jewish identity and traditions. Some people in Lehava even go to extreme measures to stop interfaith relationships, like protesting at weddings or even using violence.
Now, it's important to know that not everyone agrees with Lehava's beliefs or their methods of trying to prevent assimilation. In fact, many people believe in celebrating different cultures and religions instead of trying to separate them. So, it's always good to listen to different perspectives and learn about different beliefs.