Okay, so imagine that you really don't like someone for no good reason other than the fact that they are a little different from you. That's like one type of antisemitism, which means hating Jewish people just because they are Jewish. It's really not a nice thing to do, and it can hurt people's feelings and make them feel scared.
Now, in Hungary, some people have been behaving this way towards Jewish people in recent times. They don't like them just because they are Jewish, even though being Jewish is just one thing that makes a person who they are and doesn't really affect anyone else.
This kind of behavior is not okay. It's important to remember that we should treat everyone with respect and kindness, no matter what they believe or what they look like. And when we see or hear others being mean or cruel to someone for no reason, we should stand up for them and be a good friend.