So I get why Klaus would lash out and say things if Elijah was all "When I marry Katherine..." I'm sure he thinks Elijah has lost his goddamn mind and he's not going to be like the rest of us who try to bite our tongues and be nice because we love Elijah. He's going to try and prevent the madness.
I think that's part of the process, Rebekah. It sucks, but its not going to be a quick change. And I want him to do that as well.