Here are a few humourus incidents that I hope you will add to your listing.
1. The legendary Maulana Rehmatullah Kairanwi of India was once involved in a debate with a Christian missionary. The missionary in his opening statement asked the Maulana, "Maulana Sahib, why did'nt God save his Prophet's grandsons when they were martyred at Karbala and did'nt Prophet Muhammad pray for their safety." The Maulana answered "God cried and said I could'nt even save my own son, how I can save your grandsons?"
2. Once a missonary on his way to run some errand hired a rickshaw. The rickshaw-puller happened to be a muslim. The christian preacher began to preach the Gospel to the R.P. The rickshaw puller got annoyed and asked the preacher "How many sons did God have?" The missionary answered "One". At this the rickshaw puller got more annoyed and said "I am a thirty year old poor rickshaw puller, I have twelve children. If your God is really as great as you claim him to be, then how come he has only one son?"
Muslims and Christians will find these jokes funny for different reasons though...
Muslims might think the joke reveals that the concept of the "Son of God" doesn't make sense and it is funny how the Christians are bested here by the Muslims. Christians might find the jokes funny since they are so typical of the Muslim misunderstanding of what "Son of God" means and as such revealing of the common Muslim ignorance of this issue.
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