God is punishing them for cohabitating before marriage
Is there even a biblical prohibition against the co-habitation of unmarried individuals? I do not recall there being one, but when it comes to the bible, and most other religious "holy books" for that matter, it's all in the interpretation.
Why would your "god" single out this couple to smite for premarital co-habitation, and on the eve of their wedding day nonetheless, while turning a blind eye to the hundreds of thousands, if not millions, of christian couple who co-habitate outside of wedlock?
Are you also claiming that your "god" usurped this man's free will to have him and his bride to be in such a fashion as to leave her dead and the responsibility for her death to when on her would-be husband for the rest of his life? Is this an example of your omnibenevolent and loving "god"?
haec credam a deo pio? A deo justo? A deo scito?
(Am I to believe these things from a righteous god? A just god, A wise god?)
If your "god" was a loving god then how could he allow such tragedy. If your "god" were a just god, then why would he single out one couple for punishment but leave all the other couples that are guilty of the very same infraction totally umolested? If your "god" were a benevolent god, then why end the girl's life in such a senseless and cruel manner when a simple vision or revelation combined with prayer of forgivness? If your "god" truly wishes for each and every person then why would he allow, or cause this woman to die in a state of sin and thus guarantee she would suffer an eternity in hell? If your "god" were to actually exist he wound most certainly be malevolent and cruel.