It matters a lot more than you think, idiot. You say the most important thing is finding Mikado? How do you expect to do that if people keep stopping you because you're out here acting stupid? [He's actually concerned about worse, but let's use Masaomi!logic for now.]

Like this, [And here he points to Masaomi's chest.] You will not find him. Do you really want to find him?

[If Mikado is even here to find. For the time being, he'll take as if he were.]