Don’t give the Quran to people!
Tom provided a link to this article which had this valuable insight:
Mobasheer [one of the Bangladeshi terrorists] was always interested in religion, and his family didn’t discourage his curiosity in his faith.
Instead the father gave Mobasheer an English translation of the Quran. He wanted the son to explore the tenets of Islam directly from its source, not through a warped interpretation elsewhere.
Ironic that the father thought the Quran was a safe gift, better than “warped interpretations” of Islam. Probably, the secular Islamic father never read the Quran himself.