I just finished reading the article and it does not mention anything about their faith being a reason for their kidnapping. They were kidnapped for the same reason others are kidnapped there, MONEY! Taliban kidnaps them for ransom. But if they were trying to convert people, they might have trouble.
My bad. An assumption. Taliban and the like do not talk kindly to Christian. I read the article in a Norwegian newspaper where their faith was placed very much in focus.
Yeah, because fundamentalist Christians do nothing but talk kindly about Islam. If you've been around these forums for at least a month, you'll see plenty of examples.
Fundamentalists of all religions hate all others, and that only makes things worse.