Not surprising, Halo has always borrowed from religious texts and ideals. Hell I seem to remember the Queen ***** of ONI referencing Dante directly in Glasslands.
That said, I never thought that Halo had bad writing, indeed its universe (though more so the extended one) is one of my favorite sci fi ones out there, and honestly out of all the shooters I'VE played it has one of the best storylines (Falling behind Bioshock one)