It is important that we understand other religions, for then we can understand why people act as they do. Islam was started by a man named Muhammad. Muhammad said that he saw the angel, Gabriel, who told him that he was going to spread a gospel among men. This led to Muhammad's having dreams about the new gospel. Because of the dreams, Muhammad wrote a book, the Qu'ran, which was supposed to be the second bible. The Qu'ran contains the five pillars, along with praises of Allah and reasons to follow Allah.
Islam is the second largest religion in the world, and yet it still is rapidly spreading. When Muhammad received the message, he spread the gospel of there being one god, Allah. At that time, everyone worshiped many gods. Thus, his message was not accepted and he was kicked out of his own town. Therefore Muhammad went to Medina and there his message was welcomed and believed.
Thus from this day on, Islam still grows.
There are five pillars in the Islamic religion of which Muslims must follow. The five pillars are: Shahadah, Salat, Zakat, Fast of Ramadan, and Hajj. Shahadah is a creed that Muslims take for oaths and also say daily in prayers. Salat is the rule of daily prayers. Muslims generally pray five times a day, and they have to face Mecca, the place where Islam began. Zakat is the rule that means Allah requires almsgiving. Usually the amount of the almsgiving depends on your position. The fast of Ramadan is also known as the month of Ramadan. The rule is, no eating all day long, and that is supposed to save you from sin. Hajj is the Islamic pilgrimage you have to take at least once in your life. You have to walk seven times around Ka'ba, seven trips between Mt Sala, and Mt. Arweh. You also have to spend two days in the desert praying.
There is also a word, "Sihad," which means, "Holy war." The holy war can be fought outwardly, or inwardly. Outwardly as in spreading the gospel and war, Inwardly as in fighting inward struggles.
Islam is a very important religion to study. Islam is the second largest religion in the world, and studying the religion also allows us to understand the way Muslims act.