Okay kiddo, have you ever heard the word "nationalism"? It means having a strong pride and love for your own country and culture. And Kabyle nationalism is when the Kabyle people, who live in Algeria, feel this way about their own culture and want to protect and promote it.
The Kabyle people have a unique language called Kabyle and their own traditions and customs. Sometimes, other people in Algeria don't understand or respect these things. So, Kabyle nationalism is a way for the Kabyle people to unite and stand up for themselves.
They want to make sure their language, traditions and customs are preserved and respected. They also want to have more control over their own region, Kabylia, and have a say in how it is run.
But, just like with any kind of nationalism or love for your own culture, it's important to remember to respect and appreciate other cultures and to work towards peaceful coexistence.