What Theo said is technically true. If you liked someone that much, you'd go too. But no one ever does, do they? Staying, and seeing someone in a week, rather than now, won't make any difference to if it's going to work in RL.
Even if Theo is right, he shouldn't have said it. At that point. Maybe the next day, to her, when things were calmer?
So, Marcel was right. It wasn't the time or the place.
But Theo had to, didn't he. Because he's petulant, dickhead, spiteful, and wanted it to be the last thing Johnny heard.
Not that I'm a 'nipple' Johnny fan.
But seriously, those standing up for Theo on this one, are on a road to nowhere.