Islam as it has been revealed: Monotheism in Doctrines (monotheism, prophets, hereafter) without difference with other Monotheistic religions. Only jurisprudence makes distinction between religions but the faith is one.
Islam as Muslims follow it today: Islam is the only Monotheism regarding Doctrines while Judaism and Christianity are considered distorted.

Islam as it has been revealed: Islam has an Order of Divine Legitimacy (Sharia) deducted from the Doctrines. The spirit of Sharia comes from the Doctrines but its harmonization to age and location is made by scholars (fuqaha)
Islam as Muslims follow it today: Islam has many Sharia systems what are authenticated by the rule of man with different cultural level.

Islam as it has been revealed: Islam is One
Islam as Muslims follow it today: There are many schools of Islam where the particular sect is the combination of a particular Doctrine and Sharia school.

Islam as it has been revealed: Calls for believing in all Holy Scriptures, Prophets before Mohammed (PBUH). The Quran and Mohammed said: “follow the line of Abraham, the straight one”
Islam as Muslims follow it today: Calls for following Mohammed (PBUH) and ME! Follow Mohammed (PBUH). “Follow Mohammed, so follow ME”

Islam as it has been revealed: Don’t follow blindly the footsteps of the forefathers. Discover the world on your own using the experience of your fathers! (I mean here the discovering of world and not the decision-making processes in legal cases or disputes).
Islam as Muslims follow it today: Follow blindly the footsteps of forefathers, sheikhs and imams. Discover the world as they say.

Islam as it has been revealed: Islam is a Holy revelation where is nothing else except the word of Allah (SWT).
Islam as Muslims follow it today: Islam is collection of heroic eposes and superstitions

Islam as it has been revealed: No identity. Islam lifts the follower out of his/her identity.
Islam as Muslims follow it today: Strong identity

Islam as it has been revealed: What is our place in the creature together with others?
Islam as Muslims follow it today: What is our place in the palette of politics and power? Superiority and hegemony

Islam as it has been revealed: With very limited Ego
Islam as Muslims follow it today: With strong Ego and dominancy

Islam as it has been revealed: Opening doors for discovering the creation of God
Islam as Muslims follow it today: Closing doors in front of everything. Living an in-bred life regarding thinking.

Islam as it has been revealed: Prohibition of the behavior of Jahiliya (age of Ignorance before Islam)
Islam as Muslims follow it today: Return to the behavior of Jahiliya in the cover of Islam.

Islam as it has been revealed: Based on love, tolerance, acceptance
Islam as Muslims follow it today: based on hatred, segregation, intolerance

As you can see, Islam in the public consciousness today is fundamentally different from its original form. This is another religion that I cannot identify with. I am the follower of the original, classical teachings. Maybe alone, but still.

Allah will not remove knowledge by pulling it out of people, but He removes knowledge by removing scholars, until when there will be no scholar left and people will take ignorant leaders. They will ask them questions and they will give fatwas without knowledge, misguiding themselves and misguiding others. (Muslim)

Before anyone attacks Muslims, what a bastard people they are that they did with their religion such a bad thing, let me make a note: it is too early to attack. There is no religion, principle, or any -ism with which has not happened this, or worse. So, everyone should stay calm and think over. Man does this with everything that comes into his hands. With the world too. Just look around!