Why does maria Theresa fear that toleration will bring about political as well as religious turmoil?

Maria Theresa feared that religious toleration could lead to political instability because it might encourage dissent and fragmentation among her subjects. By allowing various religious groups to coexist without strict control, she worried that it could foster divisions that would undermine her authority and the unity of her empire. Additionally, she believed that religious conflicts could spill over into political rivalries, potentially challenging her centralized power and leading to unrest.