Why is V so mean

I feel like V became agonistic towards Jackie in the limo drive right before the heist, right after you clip the relic, and only after he just barely dies you actually care about Jackie (only if you pick the dialogue options in the limo) I am dumb? Did I miss something? I get V felt something sketchy about whole job but why be rude to Jackie? When he’s your best bud? ( I may be over thinking but I just want some kind of answer)