Okay, kiddo, imagine you are in a big group of friends at school. But there are some people in the group who think that because they have a certain skin color or come from a certain culture, they are better than others. They may not want to be friends with certain people because of these differences.
Now, some people who are Jewish (that's a religion and culture) may also hold these kinds of beliefs. They may think that because they are Jewish, they are better than people who are not. This is called racism, and it is not a good thing.
It's important to remember that not all Jewish people think this way, just like not all people in your group of friends might think this way. But when anyone believes that they are superior to others because of things they cannot control, like skin color or religion, it can be hurtful and unfair.
So, just like how we should treat all our friends with kindness and respect, it's important to treat all people, no matter their race or religion, with kindness and respect too. That's the best way to make sure everyone feels included and valued.