In the Habsburg-Valois wars of the sixteenth century why did the Catholic French kings support the Lutheran German princes?

During the Habsburg-Valois wars, Catholic French kings supported Lutheran German princes primarily to weaken the Habsburgs, who were their main rivals for power in Europe. By aligning with Protestant states, they aimed to destabilize the Habsburg influence in Germany and prevent the consolidation of power under Charles V. This pragmatic alliance was driven by political interests rather than shared religious beliefs, as the French sought to counterbalance Habsburg dominance.