How do we respond to the specious argument of non-Muslims who refuse the building of mosques in their countries unless they are permitted to build churches in Muslim countries?

One must be wary of arguing with people of falsehood unless one possesses profound knowledge. A Muslim should be certain that the rulings of Islam are true, and doubts should not affect him, whether he finds a refutation for them or not, and whether disbelievers are convinced or not. It is preferable to direct discussions with disbelievers toward matters of faith, clarifying that Islam is the true religion and that what they follow is falsehood. This is because the fundamental distinction in rulings between Muslims and non-Muslims lies in Islam being the truth; therefore, it must be propagated, and the spread of falsehood must be prevented.