If someone needs motivation, here it is!
Something I came across whilst rereading the manga: In Clash of the Titans, Reiner tells Eren it's not necessary to kill the Walled people anymore as long as Eren comes with them. Yet, in the SInagashina arc (insert sob for Erwin), Bertolt tells Armin that they require Eren AND the death of everyone in the walls. Do you think Bertolt was just angry over Reiner's state and exaggerating (he does say *he* decided that), or was Reiner bluffing so Eren would join them earlier? Or did something change