Final answer:
Both Catholics and Protestants viewed the Anabaptists as dangerous radicals due to their beliefs and practices, including adult baptism and the separation of church and state.
Step-by-step explanation:
Both Catholics and Protestants considered the Anabaptists to be dangerous radicals. This group emerged during the Protestant Reformation and held beliefs that were viewed as extreme by both Catholic and Protestant authorities, such as adult baptism, separation of church and state, and pacifism. The Anabaptists were often subject to violent attacks as a result of their views, which frightened the secular rulers of Europe because Anabaptists refused to serve in the army, hold public office, or accept the right of secular rulers to control religious affairs. Other Anabaptist movements included the Hutterites, the Mennonites, and the Amish, and despite the persecution, they formed communities that continue to exist today.