We already saw that he felt guilty about daggering her, but it was HER choice.
AND i hope that him & Klaus wont have a "fight" over it AGAIN - because it seems like a cheap excuse for some random drama imho.
Like i said it was Rebekah's choice and Klaus would have no reason to blame Elijah for doing what he did.
Right,anyways Elijah didn't like the daggers ,it was an Klaus thing but Klaus is not in his dagger mood