The Quran instructs Muslims that human diversity, including in religious and sectarian identity, is part of God's intentional design: He created humanity from male and female and made them into peoples and tribes so that they might come to know one another, and the most noble in God's sight is the most righteous. Regarding peaceful non-Muslims specifically, the Quran states that God does not forbid kindness and justice toward those who have not fought Muslims over religion or driven them from their homes, establishing justice and kindness, not merely tolerance, as the standard. The Prophet Muhammad's own example included maintaining agreements and cordial relations with Jewish, Christian, and pagan neighbors and allies, and Muslim scholars have generally taught that respectful disagreement, engaging others with wisdom and good instruction, arguing in the best manner, is required even amid theological differences, whether with fellow Muslims from a different school or sect, or with people of other faiths altogether. Sincere disagreement over belief does not, in Islamic teaching, license contempt, mockery, or mistreatment of those who are sincerely convinced of a different position.
Q&A · Sects & Comparative Belief
How should Muslims interact respectfully with people of other sects and faiths?
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.