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There are several precepts for the basis of  Islam.  They are:
·       The Trilogy - The Koran,  the biography of Mohammad (Sira), and the traditions of Mohammad (Hadith): 
The Koran is devoted  primarily to the religious side of Islam.  The Sira is the life of  Mohammad.  The Hadith (all the hadiths – small "h") are the  traditions of Mohamad.  The Sira and the Hadith are the  Sunna.  The political Islam is predominant in the Sunna at about 67%  which is to convert the entire world population to Islam.  Muslims  are bound to imitate the Sunna e.g. the life and traditions of  Mohammad.  Mohammad is Islam!
·       Dualism - Everything is  either right or wrong and both are correct.
Islam was an invention  of Mohammad.  It is divided into two parts.  The first part  is religious Islam where Mohammad received his first revelation from the angel  Gabriel in Mecca in 610 AD.  When he started preaching in Mecca he  was weak and could not gain a large following, about 150 followers in 13 years  until 623 AD when he was cast out of Mecca by primarily the Jews but also the  other religions there which did not agree with is religious  views.  That was the first and religious part of Islam.  
In 623 AD Mohammad took  his few followers to Medina where he became a political leader and a  warrior.  For the rest of his life Islam grew to billions as there  are today through politics and war.  Mohammad took revenge on the  Jews and Christians whom he named "People of the Book" and the rest of the  non-Muslims for his treatment while in Mecca.  This was and is the  totality of Islam, and the second part, which is an aggressive total life  system for Muslims consisting of religion and politics.
Both of the above are  the basis for the duality of Islam.
            (a) Religious  Islam defines the peaceful Muslim
(b) Political Islam defines the fundamental (fanatic) Muslim.
    Likewise, there are only two types  of people in Islam, Muslims and Kafirs.  Again duality.
    There is no right or  wrong in Islam.  Contradictions in Islam in any of the Trilogy are  called abrogations.  That means that what is written is true even  though one Sura (a chapter in the Qur'an) appears to contradict a preceding  one.  In Islamic law, the Shar'ia, a newer law may abrogate an older  one.  In any event, the newer text takes precedence over an older  one; however, the older one may be used if it advances the cause of Islam.  As far is Islam is concerned, Allah and his  Messenger cannot be wrong.  Duality.
     There is weak Islam and  strong Islam.  In weak Islam a Muslim may defer to a Kafir socially,  even though it be a lie, if it advances Islam and they cannot prevail otherwise  in whatever effort they may engage.  In strong Islam, the Muslims are  allowed to subdue the Kafir in the most expeditious manner available including  torture and murder of the Kafir if he/she cannot be converted to  Islam.  Duality.
     The goal of Islam is to  cause the complete submission of the Kafir until every person on the earth is a  true Muslim.
·       Allah is the only  god - Polytheism, paganism, atheism, and agnosticism (in other words  any religion other than Islam) are unacceptable.
     In Mecca Mohammad  tolerated other religions and, in fact took much of his beliefs and structure  of Islam came from the other religions, primarily the Torah and the Old  Testament.  Some of his theology even came from  paganism.  The evidence is that the name "Allah" came from a pagan  idol, the moon. As he took his followers to Medina and gained strength and  the ability to subdue his enemies he changed from his recognition of other  religions.  He made Allah the only God and everyone else became the  Kafirs, those who are all people other than true Muslims.
·       All people are  slaves - Muslims are slaves to Allah, all others are slaves to  Muslims.
    This is one of the basic  precepts of Islam.  The word "slave" came from Mohammad's conquest of  Slavic tribes, a derivative of the word Slav.  Islam teaches that  Muslims are slaves and all others (Kafirs) are slaves to  Muslims.  The belief is that Allah demands that Muslims convert or  kill Kafirs with some inventions of Mohammad.  There is the "Dhimmi"  who is a Kafir who does not convert to Islam but abides by a treaty which is an  agreement between Muslims and Kafirs whereby the Kafirs agree to give up rights  as free people so they may live (See Treaty of Umar).  The Dhimmi  becomes a protected class of non-Muslim… a Kafir under the protection of  Islam.  Slavery was not invented by  Americans and the Western World.  It was  and is a major enterprise of Islam.  The  slaves were sold to Americans and western traders by Muslims in Africa and  other European states.  Slavery is  illegal in America but not in Islam today.
     It is the responsibility  of every Muslim to fight jihad (jihad was invented by Mohammad) in whatever way  possible to convert or enslave the Kafir.  The strongest will fight  by war.  The old, women and children will support the warriors by  providing shelter, food, money, etc.  Islam invades Kafir lands and  confiscates everything of value. It kills or enslaves the strongest enemy and  enslaves the rest if the Kafirs do not submit (Islam means submission).
A very disturbing thing about Islam and jihad is  a section of the Healthcare law relating to Dhimmitude on page 107 that exempts  Muslims from complying with the mandate to purchase  insurance.  (See Muslims Exempted)
Islam is here in America.  This short  summary highlights some of the basics of Islam.  There is nothing in  this theology that is good for America.
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