There's always a certain level of danger associated with individuals who have this sort of mentality. It's a hard lesson that Aziraphale has had to learn over the years, but learn it he did. While Crowley might be saying something to imply they only selectively kill demons, Aziraphale isn't able to dismiss it.

"Wouldn't a high rank be a detriment on this occasion?" he asks, a little distractedly as he shifts beside Crowley. He moves to pull his arms around Crowley again, tugging him close and hopefully keeping out any errant cold air.

Important to keep the lair protected.

Also important to have something to tie to these people. Names, ideally. He glances over at Crowley. "Did you happen to get their names or anything?"