"Mars Hill" refers to Paul's encounter with the Epicureans and Stoics in the Areopagus at Athens. You can read the biblical narrative of the account here. It is the textus classicus for detailing true biblical contextualization. After you've read the biblical text, see whether this is not a good timeline of what Paul did:
- Paul arrived in Athens and was provoked by the way that the city was full of temples and idols.
- Paul immediately began to preach explicitly the exclusive gospel of Jesus Christ both in the synagogues and out in the public marketplace to whomever would listen. This was Paul's continuous practice and went on for an undisclosed number of days.
- Epicureans and Stoics heard Paul preaching and took him to the Areopagus to find out more details about what Paul was preaching. Paul arrived there and began to preach.
- Paul mentioned his observation that the people of Athens were "very religious."
- Paul noted the existence of the temple "TO AN UNKNOWN GOD."
- Paul used the existence of this temple to highlight the ignorance of Greek religion.
- Paul promised to supplant their ignorance by proclaiming revealed truth.
- Paul publicly rejected the entire Greek system of temple worship, including by extension the temple to an unknown god, by stating flatly that God does not dwell in man-made temples.
- Paul stated that the purpose of mankind is not to care for (tend to the needs of) God, but to seek God.
- Paul cited Greek poets to illustrate that even Greeks acknowledged that people are "His children."
- Paul used the doctrine of God's fatherhood to highlight the foolishness of Greek idolatry—how can people be the children of a statue of gold or silver or stone?
- Paul demonstrated that the statues come from men; men don't come from the statues.
- Paul highlighted again that Greek religion was ignorant, but Paul proclaimed the good news that God was ready to overlook their past ignorance.
- Paul articulated God's demand that those in ignorance repent from their idolatry.
- Paul proclaimed the coming day of judgment through Jesus.
- Paul offered the resurrection of Jesus as proof of Christ's role as Savior and Judge.
- The people who were listening understood clearly what Paul was preaching. As a result, some sneered. Others were interested in further discussion. Yet others gladly received the gospel.
The major difference between The Camel and Paul's work in Athens is indeed a C-word, but not contextualization. The key difference regards confrontation.
Consider again the pattern of bold confrontation that Paul brought against false religion in Acts 17. He declared their religion to be ignorant of God. He used their own religion (the temple acknowledging that the existence of the "unknown" in their religion...the poems declaring that we are God's children, not the gods' sculptors) to disprove their religion. He did not leave them to draw their own conclusions—he spelled it out for them. He confronted their city full of temples. He confronted their city full of idols. He confronted the core principles of their religion—the nature of the Divine. Paul said that God was no longer willing to overlook their ignorance. On the authority of God, Paul called upon them to repent. Paul asserted Jesus as the exclusive Judge of all mankind.
I think that Acts 17 gives an excellent paradigm for repairing The Camel. Greeson's book very delicately avoids confrontation with Islam. Indeed, the fundamental distinctive of The Camel seems to be its way of trying to present Christianity without confronting Islam. As a result, the most troubling aspect of the book is what is not in it, not what is in it. A person carefully following this method is never instructed to confront the Muslim god as false. He is never instructed to confront Mohammed as a false prophet—he is rather carefully and explicitly instructed in saying just the opposite (see here). He is never instructed to confront the Qur'an as ignorant of the true God, the true Jesus, and the true faith. Indeed, the method depends upon the Muslim's reliance upon the accuracy of the Qur'an.
Speaking of camels, G. K. Chesterton wrote: "Do not free a camel of the burden of his hump; you may be freeing him from being a camel." Greeson's book clearly regards the confrontation of false religion as a burden—an obstacle to be overcome in evangelization. Paul regarded it as an essential part of evangelization. I think it would remedy many of these ills if Greeson were to restore the biblical hump of confrontation to his camel of Muslim evangelization.