Dirk doesn't flinch. But he does keep a finger on the button on his walkie so their dialogue might be broadcast for everyone else to hear.

"Well, we sure as hell didn't invite you over to the airfield, and yet you saw no issue with sending your pigs to sit on our lawn. So we can either chat properly now, mano a cerdo, or we can skip the pleasantries and just get to the part where I kick your ass."