Oh, he knew about Karr's claws, and had been careful to steer clear of them while holding the kid down. If he was disappointed in the reaction, there wasn't any sign. He just watched until Karr stopped yelling. Only then speaking up in the same cool tone. "We also don't allow twelve year olds on the team. Are you finished with the temper tantrum?" The only reason he hadn't turned and left at that reaction was, again, Logan. He gave the words about as much weight as a temper tantrum from a child, as well.
Then the big man sat down on the ground, glancing to Logan...even if he was still watching Karr out of the corner of his eye. There had been no further racist terms in that statement, so for the moment the subject was dropped. "Situps this time, until I tell you to stop." And just like that, they were back into the workout routine, James settling in to do ten minutes of the situps this time, before calling a stop.