I was going down to the kitchen to continue the Beyond the Beef quest and my companion Cass just started attacking every White Glove she saw. They didn't attack me after knocking her out, as i left my weapon sheathed and they were still HUD color to me. All I did was kill Phillipe in secret, which no white gloves attacked me in the kitchen afterwards. So when we go up to the dining hall during Mortimer's speech, a few random White Gloves start attacking us, even me before I could interrupt Mortimer. Also when i spoke to Mortimer, the dialogue went turbo speed and skipped every line w/o me doing anything. I timed it right after he talked about going back to their old ways and my 1st dialogue option was to yell and say the kid won't be eaten.

edit: also, after Mortimer's turbo dialogue and him turning red to me, Marjorie began attacking me as well. According to everything I've read, you can kill Mortimer and Marjorie will still be willing to talk/reason w/ you.

I had trouble with the last part of the quest too. I solved it by using the console to kill off the White Glove Bouncer, who was aggressive. After that it worked. When I later resurrected her she wasn't aggressive any more.