Only a fraction of converts are attracted to radical strands of Islam, they point out, and even fewer are drawn into violence. A handful have been convicted of terrorist offenses, such as Richard Reid, the "shoe bomber" and American John Walker Lindh, who was captured in Afghanistan.
Admittedly patchy research suggests that more women than men convert, experts say, but that - contrary to popular perception - only a minority do so in order to marry Muslim men.
"That used to be the most common way, but recently more [women] are coming out of conviction," says Haifa Jawad, who teaches at Birmingham University in Britain. Though non-Muslim men must convert in order to marry a Muslim woman, she points out, the opposite is not true.
Fallot laughs when she is asked whether her love life had anything to do with her decision. "When I told my colleagues at work that I had converted, their first reaction was to ask whether I had a Muslim boyfriend," she recalls. "They couldn't believe I had done it of my own free will."
In fact, she explains, she liked the way "Islam demands a closeness to God. Islam is simpler, more rigorous, and it's easier because it is explicit. I was looking for a framework; man needs rules and behavior to follow. Christianity did not give me the same reference points."
Those reasons reflect many female converts' thinking, say experts who have studied the phenomenon. "A lot of women are reacting to the moral uncertainties of Western society," says Dr. Jawad. "They like the sense of belonging and caring and sharing that Islam offers."
Others are attracted by "a certain idea of womanhood and manhood that Islam offers," suggests Karin van Nieuwkerk, who has studied Dutch women converts. "There is more space for family and motherhood in Islam, and women are not sex objects."
At the same time, argues Sarah Joseph, an English convert who founded "Emel," a Muslim lifestyle magazine, "the idea that all women converts are looking for a nice cocooned lifestyle away from the excesses of Western feminism is not exactly accurate."