Martin Luther risked death by challenging the Church's authority. Was Martin Luther a hero or a fool? Why?

He didn't want to me controlled by the church anymore. Some called him a hero because they wanted to be free as well. Others called him a fool because they though the church ruling was just fine.

Martin Luther was a hero because he risked his life to stand for something he believed in. We consider veterans the same because they risk their life for our freedom.