Song Lyrics in FFXIV: Compilation, Discussion, and Interpretation

[Mysteltain]

"Thunder Rolls" is not necessarily so morbid. It is all thematic to Ramuh, of course. Who believes that he is just. There is the implication that the old man believes in original sin and probably does not hold that against all, certainly not his children (the sylphs). The refrain would imply that comfort should be taken in some of Ramuh's thematic aspects that aren't so pleasant. Storms, stinging rain, etc. I do not interpret the song as being entirely a righteous condemnation of man.

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Musings on what Ramuh brings to the table regards Life, The Universe, And Everything.

Nice Hitchhiker's Guide to the Galaxy reference, or maybe it's not and I'm just imagining it because I saw the movie for the first time in around 5 years, heh. Anyway, I agree with how Thunder Rolls is essentially telling the Spoken races to not necessarily fear his judgment, but to instead face their sins with resolve:

Step into the storm, know its mercy (face Ramuh's judgment and know that he is just)
Let the wind and the rain crash down over thee (it will be difficult to face, but do not fear it)
Lightning bright, thunder bold
Guiding us forevermore (he's doing this to lead you down the right path)

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Step in from the storm, praise its mercy (after facing his judgment you'll be thankful for it)
Let the sting of the rain ne'er stray far from thee (always remember what you've done in the past so as to not repeat it)
Lightning bright, thunder bold
Freeing us forevermore (you are freed from the sins of your past)

He does make it quite apparent that he feels that the Spoken races are the only ones who have darkness in them, or at the very least simply blames them for all the ill in the world.

Also, going by your interpretation of Answers, one line reminded me of Y'shtola's words during both the Titan, Leviathan, and Ramuh quests: "Judgement binds all we hold to a memory of scorn". We do, in fact, know a bit about why the Primals are passing judgment upon us: the Spoken races either betrayed, provoked, or simply fell into fighting with them. The Lominsan's had a deal with the Kobolds and broke it, and fought with the Sahagin instead of negotiating with them (although the fault lies in both parties here). With the Sylphs, it was largely because of Garlemald invading and attacking them that they summoned Ramuh, but it certainly didn't do the Gridanian's any favors.