I just had an excellent conversation about the Camel Method with some friends. In case you aren't familiar with it the camel method is basically the approach to evangelism and missions that uses the Koran as a bridge to draw Muslims to the gospel. It basically is an approach to using the Koran as an evangelistic tool in an attempt to make it "easier" to speak to a muslim about Jesus' holiness, power, and position.
A few thoughts...
1) It seems that this method is a subtle pursuit to avoid persecution.
2) It seems to feed ignorance and insecurity about what one knows about the religion of Islam and makes Christians think that they can't share the gospel without using the Koran. This appears to be a prideful undermining of the sufficiency of Scripture. The Bible is the revelation of how mankind might be saved into a relationship with the one, living, triune God. The method seems to undermine the authority of the Bible. This method is not the same as Paul quoting a prophet from Crete (Titus 1:12) or a Greek poet (Acts 17:28)...it doesn't ever appear that he is claiming that those sources have authority (the camel method seems to).
3) It is deceptive and doesn't have a lot of integrity as it is basically a bait and switch tactic. [If we establish in people's minds that the Koran is indeed authoritative how are we going to remove that from their minds? This seems to scream bait and switch.]
4) Christians need to spend more time gaining an understanding of what the Bible teaches about God and themselves. This will enable them to share the gospel and apply the true authoritative Scriptures to the individual situation.
5) You don't have to have an understanding of every religion in the world (and their writings) in order engage people with the gospel. A good solid understanding of the true God and the true state of man will enable us to share the gospel most effectively (similar to how one is trained to identify counterfiet money...they don't look at all the possible fakes...the just study the true thing intensly and analytically).