I have been RPing Kazuma as a Chaplain of sorts since my days in the the Knighthood, and when I would try to preach, I never had people be negative towards it (granted I was preachy in Amarr loyalist channels usually).
I haven't shied away from the fact that Kazuma is a Khanid Holder, slave owner, enlightener, and from corp history a Sarumite (also just from my corp history, they might think he is a closet Blooder due to some of the ties that Ebon Seraph and Dark Seraph once had (I am not, but can't say that if I went Pirate, I wouldn't go that route)).
I have always enjoyed the fact being a Khanid that my enslavement options are wider then if I was a traditional Amarrian, and the means that I can use are wider also. Although in all RP sessions, I have tried to RP the use of enlightenment as a way to control my slave (and possible vitoc), I haven't gone much down the road of implants to change the brain.
The Khanid should feel even less awkward, as they really don't have to fear TC scrutiny. All in all, the Kingdom is less about religion than the Empire, anyways.
Nico,
I always saw the Kingdom as being able to be more religious then the Empire, since we had the Zealots and Cyber Knights as a background choice. I just got the impression that since King Khanid allowed the Cult of Tetrimon stay in the kingdom without being oppressed, it meant we had a purier orginal view of the religion (with the whole enslave the lesser races, bring them closer to god, work them to death if they don't want to embrace God).
Guess that is my take on it.
~ Kazuma