Board Thread:Suggestions forum/@comment-25754873-20150810205319/@comment-26335978-20150811000057

To get negative alignment with Gondor, you kill Gondorins. But, when you kill one it decreases your Rohan alignment as well. I don't think Gondorians would care if you gave a Rohirrim a mini-quest request, and it's quite possible for one faction to trust you more than  another.