There's a small, fleeting moment of guilt for being so abrasive but it's quick to disappear under the more pressing amount of do not want he has for this situation. He's tired of having muggle references and muggle artifacts thrown in his face and he's sick of not entirely grasping the situation. Dirk is the muggleborn, he should be the one adhering to the situation, right?

He turns away from the laptop and folds his arms over his chest, refusing to look at it. Childish? Maybe a little, but he can't think of a better way to handle the situation.

"I said I don't want to."