He is shocked! Garrot shocked him! In a good way for once. He was still deep in his thoughts, pondering what he could've said, or should've said, instead of just dropping the conversation. It means he doesn't even look at his phone again until Garrot has sent that second text.

He's impressed, and he smiles thoughtfully at the message. Honesty helps, even if it's an unnecessary apology.

《I'm not mad. You're wrong, but I don't have the words to explain the sickness I see in all of you. And there are worse things to be wrong about then wanting to live where you were born.》
《Anyway, why shop when you can hunt?》