Klaus had trouble seeing Kol as a good friend to anyone so he just raised an eyebrow at that comment and let it be. They could agree to disagree on that one.
"She deserves that. She's had a hard time of it." Was some of that due to him? Very much so. He knew that, but he also felt that he'd been working in Rebekah's best interest, even if she didn't always see it that way. "We all have, really." Even Kol, but he wasn't going to make excuses for his brother.