The key central beliefs of Islam is that “No One is worthy of worship except God.” This is callthed the Tawheed which is belief in one god. One cannot worship a different god or hierarchy than another in this religion. An example is comparing this to Christianity; One cannot worship Virgin Mary while worshiping God or being within the Christian religion.
This is reflected in the pillars: * Shahada: Testimony that there is no one worthy of worship except God. The possession of Faith. * Prayer: We pray to God alone. Ritual Prayer. * Alms giving / Zakat: Muslims are required to give money to the needy or those who need money every year. This is a way of purifying our wealth. * Sawm / Fasting: Those influenced by the religion are to fast. (Go without food) which develops God’s consciousness through their spiritual lives. * Hajj: Pilgrimage to the house of God. (To Mecca). A spiritual and physical journey to the Kaaba.
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I think that the Shahada is the easiest way to understand the unity of god because when you read the bible it also explains the unity of god and that is the best way to understand the way god was and how he helped out people that were in need of help and also had the ability to heal people that needed to be healed. So I think that the unity of god is one of the easiest ways and not only can anyone understand the way the life was when Jesus Christ was alive and also how he sacrificed his life for our sins. The Muslims were very strict on their religion and they are very faithful to their religious beliefs and how everything is done. I believe that till this day they are still faithful. Some of the Muslims are not as faithful to their religion as people were back in the ancient times. When they had to and they had no choice but now people have rights and they can do what they want to