During active warfare, mankind should agree upon one month of peacetime. This would serve as a cooling off period. They ask you about the Sacred Months and fighting therein. Say, "Fighting in the Sacred Months is a grave offense (2:194). However, repelling from the Path of Allah, rejecting His Command and the sanctity of the Sacred Masjid, and evicting its people, are greater offenses in the Sight of Allah. Persecution is a greater crime than killing." They will not cease from fighting against you till they revert you from your religion, if they can. Those among you who revert from their religion, and die as disbelievers, have nullified their works in this life and their rewards in the Hereafter. These are the companions of Fire; they will abide therein.