Minthara should absolutely explain the absolute to you. She should understand that you're from the ship and see you as a gift, she should give you the sales pitch on the religion. She should tell you WHY the absolute is building an army. She should show us the humans who are living in harmony with the absolute. Instead of murdering all the tieflings, you should kill their leaders and the rest should be given the choice to join or die.
Even Lolth's drow don't massacre everyone when they take an area. They take slaves, soldiers, etc. The Absolute should be a *less chaotic* force of evil than Lolth, and we should have some reasons why we do things. "Evil!" isn't good enough, that's not a motivation
Thank you for writing this up. Minthara does not clue you in on anything and thus comes across as a one-dimensional villain nobody in their right mind would betray everyone they have met so far for.