Henry I, Duke of Guise, was a charismatic and powerful man who was popular with the public. His hostility towards the Huguenots, the French Protestants, earned him a great deal of adulation amongst the Catholic population. People saw him as strong and committed, while King Henry III was considered weak in contrast.
In 1576 the Duke of Guise formed the Catholic League in order to keep Henry III’s Protestant heir off the throne. This would lead to the War of the Three Henries in 1584. For now, the relationship between Henry III and the Duke is strained, and the Duke of Guise stands as a significant threat to the King.