As a previous Christian convert to Islam I learned that it isn't just Christians that have a misunderstanding of Islam, but Muslims have a misunderstanding of Christianity.
1. The bible is corrupt. (If the Bible is corrupt, then everything that Christians believe is false). But the Qur'an teaches that the Tawrat and the Injil were given as a guidance to humanity.
2. All Christians believe Jesus is God. (Many Christians do not believe Jesus is God.)
3. The Qur'an teaches that Jesus can't be the son of God. Certainly not in the sense that the Qur'anic context places it--the polytheistic gods had children who became gods, so Jesus can't be God's real son, because there is only one God. The sonship in Christianity is theoretical. Kings called lesser kings during this time period "son." Is your Muslim brother your real brother? This can't be! Therefore, the Qur'an and the Injil are correct.
4. Jesus said "turn the other cheek," which is not what the Qur'an teaches, therefore Jesus teachings are less than Muhammad's peace be upon them both. This is rudimentary understanding.
What is really occurring here? The Chosen People Syndrome. I approached the Qur'an with an open heart and mind--it is Truth! Muhammad is a Messenger of God! However, I defended my advanced knowledge of the Bible,but to no avail, because Muslim minds are closed.
This is how I approach the respective religion's finger pointing:
If the Qur'an is true, then the Bible can't be false. If you say the Bible is false, then the Qur'an must be false. Because Muslim beliefs regarding the Bible contradict the Qur'an. The Qur'an was certainly sent as a criterion — to correct misinterpretation leading to false beliefs. Jesus is not God, Jesus is not a son like the sons of the polytheistic gods, because there is only One God. The interpretation of the crucifixion account in the Qur'an is not accurate. Why? Because the account in the Bible is true, so the account in the Qur'an must be true--it is not interpreted correctly. Other false beliefs of some Muslims:
1. All non-Muslims will go to hell.
2. Many Muslims believe it is their duty to set Christians straight - their bible/religion is false, Islam and the Qur'an is the best. Everything that is written in the Bible is included into the Qur'an and more - no need for a Muslim to study the Bible for themselves.
3. The West is immoral. According to a London Imam, there is a worldwide epidemic of Muslim men forcing their wives and children out of the house without support because they have become interested in another woman. I volunteered in a Masjid where we were frantically trying to find housing for Muslim women and children who were kicked out without support which is against the law in my state. Many Muslim men are now engaging in serial monogamy. This is sin and goes against the Qur’an’s teaching on divorce, and you can’t blame this on the West. And, some Imams can’t seem to locate the marriage contract so the wife has no financial recourse. A legal marriage license with the state or country would partly resolve this issue.
I also learned that female single converts are at the bottom of the Islamic hierarchy which is why so many of them are leaving Islam. The Mahr for a convert is much less than for a born Muslim woman.
I left Islam. But I am still a believer and have returned to Christianity but work educating others that God created all religions. It doesn't mean one religion is better than another, because if you believe your religion is better and holds the only truth, you are enmeshed in collective ego which divides and will eventually lead to religious persecution - not God's will. It would be nice if Muslims were able to have a conversation with Christians without firmly telling us what is wrong with our book and our religion. Most of those that do this have never even opened a Bible, so don't have understanding but are only repeating what they've heard, including following some of taqlid's misinterpretations through the centuries. It is now time for a criterion over the misinterpretations of the Qur’an itself.