They were attacked because:
The Catholic Church in France and many of its members opposed the Huguenots. Some Huguenot preachers and congregants were attacked as they attempted to meet for worship. ... Retaliating against the French Catholics, the Huguenots had their own militia.
Answer:
When King Louis XIV ascended the French throne in 1643, persecution of the Huguenots began again, escalating to the point that he directed troops to seize Huguenot homes and force them to convert to Catholicism. I hope this helps ya :)
Explanation: