Islam Versus Different Schools: Liberalism and Pluralism

"And whoever acts hostilely to the Apostle after guidance has become manifest to him, and follows other than the way of the believers, We will turn him to that to which he has turned and make him enter Hell; and it is an evil resort. " (Al-Quran, 4:115)

These and similar verses issue a threat to the infidel, so to understand them properly, we need to examine three issues: (1) to precisely whom the threat is issued, (2) under what conditions it is issued and (3) whether it must be carried out.