"You could have just said you didn't stop it because Devil would've tried to kill somebody instead of saying all that bullshit about 'tradition.'"

Eren takes a long drink from the "soda." He doesn't see how maintaining the lost idioms is important beyond the others deciding they needed to, and as far as he can tell that just ties back into the not killing each other argument.

"Sometimes the only way to advance is to make sacrifices. War might be the only way forward. ...But if you go to war, you can't save Fortune and the others, right? I get it, but I... Shit! We Travelers aren't just your damn pawns! I'm fighting to protect my friends too, Cairbre! I can't forgive what's been done to them that easily!"