The arguments you have given so far do not counter the idea that they are Vivecs army of lovers and I can be long or short about it, but considering you don't just ignore all the subtle hints but also a straightforward post by MK, I can only assume ulterior motivations that cause you to purposely ignore all this.
There's no concrete evidence that they're anything else than a loyal bunch of holy warriors. And as I said before, love is not always sixual, especially when we're talking about gods.
And I can only assume a belief in your own theory's infallibility that you purposely ignore all in-game evidence aside from a few books. Given how much you've contributed to accepted lore, it's pretty understandable.
And either way, blindly accepting the Sermons as true would break my suspension of disbelief, because it's inaccurate to present a religious text as indisputably true and accepted.