What were the groups threatened by Ignatius Loyola's ideas?

Ignatius Loyola's ideas, particularly those underpinning the Jesuit order, threatened several groups, most notably the Protestant reformers who opposed Catholicism and sought to reform Christian practices. His emphasis on education, missionary work, and the spiritual exercises posed a challenge to established religious authorities and traditional practices within the Church. Additionally, Loyola's focus on loyalty to the Pope and the Catholic Church alarmed secular rulers who were wary of the Church's influence in political matters.