It makes sense to me. I don't know if it's because I understand how LDS talk in these things, or because I've got a big vocabulary, or both. I think both.
To condescend is to do something that's beneath your status, that is 'dirty work' or demeaning, in some way.
Reading between the lines, in my honest opinion, he's being thanked for working as their hitman, despite his 'godly' status.
A patriarchal blessing is an interesting thing, by the way, one of the things that I feel is closest to the divination roots of the early church that still remains mainstream, and it makes sense that Chad would misuse it in this way to manipulate his loyal followers.
MOO
Just adding to what I said here about language, and why I interpret it the way I do.
When LDS pray, or give blessings that include a degree of divination/prophecy (infant blessing, confirmation after baptism, blessing for the sick, grieving, or troubled, and patriarchal blessings are all forms of this) they speak using fairly antiquated language.
The usage of condescend in this way is distinctly nineteenth century and earlier.
Take this line from Mr Collins in Pride and Prejudice about his beloved patron, Lady Catherine de Bourgh:
“I need not say you will be delighted with her. She is all affability and condescension.”
Now, this reads differently to a modern audience because though far from affable, Lady Catherine is indeed full of self importance and rude to anyone she deems beneath her.
But that's not how Mr Collins, or indeed Austen, probably meant it. (Or if Austen intended it that way, which it's entirely possible she did, she knew her contemporary audience would understand the double meaning.)
What he was saying was that she was kind, generous, and took the time to acknowledge and interact with those of lower status in her role, by birth, as one of higher society, called
noblesse oblige. The obligation of the upper to the lower classes. Look at Bridgerton and Daphne's well-meaning failure to judge the pigs. Her actions upset the entire order of things because she didn't understand her role. Her handing out of gifts to the villagers is also part of her 'noble obligations'.
So, much like Mr Collins, Chad is acknowledging Alex's kindness to condescend to undertake work, which, as a God, is below him, for the good of the cult. He's saying, you didn't have to do this, but you did, and there's no way we can repay you, and there will be more work for you in the future.
MOO