There are scores of similar stories on the web. There are even a few ex-wives who are willing to speak openly about their experiences because every girl feels their prospective groom is not that kind of Muslim. A tiny percentage of them might actually be right.
Most, however, are not. While it is chic in some circles to change Christian brands for various reasons or even pick a third way like Buddhism or Judaism, Islam is not a religion you can cast aside like a nose ring.
The ultimate test should be to tell him she loves Jesus Christ and if he is devoted to her, then he will convert to Christianity as well. There are more than 300 brands to choose from and she will let him pick the brand as a compromise. Then see if he will start attending services with her.
My neighbor is a Muslim married to a Christian woman. He is a wonderful man who has Westernized daughters and loves my dog. But he is a Berber not an Arab. The Berbers are said to be good people.