It all will depend on what religion KK gets. If that will be judaism then ok with your suggestion, but right now Izzy is actually worst enemy of KK.
Also note Qin is buddhist, but is not the owner of the shrine, that must be izzy as well, I guess. So I don't think it's that much more likely budd will get to us because of OB with Qin. Frankly, with Izzy so far away, I don't think we need to fear rejecting any demands of her.
And OB with KK, well, I generally don't like OB with a much more powerful neighbour until I feel save enough and able to repel him in case of a DoW. He could be checking out your land to sell it to the highest bidder, as the game sometimes tells you at the start up...
So basically, I wouldn't change current deals (or no deals) until religiously things change.
Oh, KK at odds with Capac? They seem to be pleased with eachother for now, no?