Complex sentence: Protestantism has been a dynamic force, providing a come dynamic competitor against which Catholics and Buddhists have been forced to compete, as well as the inspiration for numerous smaller sects.
Split into simpler sentences: Protestantism has been a dynamic force, providing a dynamic standard against which Catholics and Buddhists have been forced to compete. It made for a dynamic competitor against which Catholics and Buddhists had to compete, as well as the inspiration for numerous smaller sects.