The party turned out to be an attempt to proselytize the women. They were told about various teachings of Islam, given a Koran, and encouraged to convert. It does not seem that the women got quite what they expected. I found the following comment of note:
Others said they were offended by what they considered anti-Christian aspects of his lesson, including a claim that Jesus was not crucified but that "someone who looked like him" was put to death in his place.Yes, this is Islam 101, the idea that Jesus was not put to death by crucifixion. There is a split of views within Islam, but the "replacement theory" is one of the more popular ways in which Jesus' crucifixion is denied.
You cannot be both Muslim and Christian. Some of our most fundamental views of Christ are denied by Islam, including both his divinity (which should be more offensive) and his crucifixion.