"Does fucking hold mean fucking drop?!" Ser Alliser has a lot of unredeeming qualities, but he is a total hypebeast. He was a Targaryen loyalist after all, that's why he's on the Wall, so the man can scrap. I think that contributes to his hatred for Jon, aside from his jadedness and distrust of the wildlings, Jon's father was responsible for him going from an annointed knight to a Night's Watchman, then that man's bastard shows up and starts becoming super-Crow, it's gotta get under his skin. Also Grenn went out like a homie taking the King of the Giants with him. I don't think Ygritte would have ultimately killed him, which is the tragic thing, Romeo and Juliet. And Giants riding Mammoths are metal as shit. Robb's wolf was Grey Wind.