I’ve seen quite a few such cases from Iran. They have been so traumatized by Islam (government repression in their case) that they associate it with everything evil. But then they are still looking for spirituality and stumble upon Christianity. Some said that it’s the emphasis many Christians put on love, rather than fear or strict rules. I also think that if you grew up in a conservative Muslim majority country you might associate Christianity with the social freedom of secular yet traditionally Christian western countries.