There are two types of terrorism, a terrorism that is practiced against Muslim and terrorism Muslims practice. The terrorism practiced against Muslim is an old one as it started by strong polytheists when the Islamic Da´wa was in the bud. Later, it took different forms such as crusades, sectarian strives, missionaries, and ethnic and religious discriminations. The terrorism Muslims practice against each other starts with takfir [accusation with unbelief] and ends with destruction and bombings.