What were the reasons for the rise of the popular movement in the Netherlands in the 16th century?

What were the reasons for the rise of the popular movement in the Netherlands in the 16th century? Why did it take on a national liberation character?

The reason for the rise of the popular movement was the desire to free themselves from Spanish oppression. In this connection, the Dutch revolution took on a national liberation character. This revolution is also called the first bourgeois revolution. Ultimately, the struggle for independence dragged on for almost a century. It was completed only at the end of the Thirty Years War, which significantly changed the balance of power in Europe.