https://en.wikipedia.org/wiki/Protestantism
The French Huguenots were terrorised purely for following their Religion which is strict Protestantism.
King's normally were in the power seat and always Catholics,they varied in their hatred of the Protestants, but really looking at the bigger picture it was Power that they wanted.
Step in Comte Schomberg, a Protestant who refused to become a Catholic and yet he became A Marshall in France in 1676. His Religion was suddenly not important to the King as his worth was obvious by his titles, Religion is used as a weapon more so than a faith in my view..so he got the top dog's job a Marshall amongst many other titles he gained before that and along the way. The family had already had a long History in France.
https://en.wikipedia.org/wiki/Freder...e_of_Schomberg
This 2nd link below explains more of the History and Religion of Schomberg whose name was really Friedrich Hermann von Schönberg but changed when he landed in France.
https://www.historynet.com/schomberg.htm