I just finished the Arizona Killer quest, by blowing up the vertibird. it said I got Legion fame and all that, and the quest was completed and told me to go back to Caesar. But when I do, they immediately start attacking me! All Legon memebrs do, even ones at Cottonwood Cove and such. what's going on?

Lol you probabally forgot to take the Ncr armor off,

I always forgot, so check that