Why was king James 1 so opposed to the separatists' philosophy and practices?

King James I was opposed to the Separatists' philosophy and practices because they challenged the authority of the Church of England, which he believed was essential for maintaining political stability and unity in his kingdom. He viewed their desire for religious independence as a threat to his rule, fearing it could inspire further dissent and rebellion among other religious groups. Additionally, King James was committed to the idea of a single national church, seeing the Separatists' practices as divisive and contrary to his vision of a unified society under his monarchy.