I certainly agree with the value of learning about what appear to us to be "alien" cultures. Note : I say 'learning about'.
In the essay, the writer states that these 14 year-olds are "taught" that Allah is God. Maybe this says a lot more than the literal words. If, by the teen years and high school, a young American is sufficiently uninformed or uneducated that it is necessary to "teach" who or what God is, perhaps the problem is greater than the writer imagined.