Why do Muslims abuse non-Muslims by calling them Kafirs?

Kafir means one who rejects. ‘Kafir’ is derived from the word ‘kufr’, which means to conceal or to reject. In Islamic terminology, ‘Kafir’ refers to one who conceals or rejects the truth of Islam, and a person who rejects Islam is referred to in English as a ‘non-Muslim’.

If a ‘non-Muslim’ considers being called a ‘non-Muslim’ or ‘Kafir’, which are one and the same, as an abuse, it is due to a misunderstanding about Islam. He or she needs to reach out to proper sources for understanding Islam and its terminology, and not only will they not feel abused but will appreciate Islam from the proper perspective.