An Indonesian reader has made several comments in the threads below, I have compiled the comments here for your reading pleasure.
"Your quote that Barry was "previously quite religious in Islam" is not found anywhere in the article."
Yes it is.
"Saat itu, dia memang beragama Islam..."
Translated in English means
"At that time, he was quite religious in Islam."
"There is no way that Indonesian teachers at the school would teach six year old students to hate the west or hate people of other religions. Since he was only six, doubtless he has forgotten most, if not all, of the things that was taught in his religion class.