"Nothing, then," Klaus answers for Logan, and there is nothing of his usual fake cheerfulness to his smile, just anger. "You know nothing about us."

And before Logan can answer, Klaus is rushing towards him. He's fully expecting to be greeted by a fistful of claws, and fully ready to dodge and get into Logan's personal space.

The violence itself is never quite as fulfilling as the kill; he's going for his throat, not drawing it out.