Ok, kiddo, let's imagine that one day you wake up and people start treating you badly just because of who you love. That's what happened to some people in Germany a long time ago when a group called the Nazis took control of the country. They believed that some people were better than others and that some people shouldn't be allowed to live because of who they were.
One of the groups they didn't like was people who loved someone of the same gender. They called them homosexuals. They believed that being homosexual was wrong and that people who were gay were not real men or women. They thought they were sick and needed to be cured.
The Nazis made laws that said being gay was a crime. They arrested people who were gay and put them in prison. They forced them to wear special clothes that marked them as gay so other people would know they were different. They even made some people wear a pink triangle, which became a symbol of the persecution of gay people during this time.
Things got even worse for gay people during World War II. Hitler, who was the head of the Nazis, decided that gay people were a threat to the German people and ordered them to be killed. Many gay people were sent to concentration camps, where they were forced to work hard and live in terrible conditions. Some were killed by gas chambers, just because they were gay.
It was a terrible time for many people, including gay people, who were treated unfairly and cruelly just because of who they loved. We should always try to treat people with kindness and love, no matter who they are or who they love.