She is not being judgmental at all. Revelation was written by John, in apocalyptic literary style, to encourage first century Christians being persecuted to be true to themselves and to their faith. In fact, John was not addressing people who were not Christian, because non-Christians hadn't taken on a thing they needed to give up. On the other hand, some Christians were abandoning something they believed in for their personal safety or for their family's safety and daily provisions. If they were killed or imprisoned, who would take care of their little children. If they lost their employment who would feed their family?
John, who had watched Jesus die on the cross because Jesus would not abandon proclaiming God's message, had to have had this starkly in mind when he wrote Revelation his for fellow Christians. If one truly embraces the way of Christ, one cannot simply shed it at the first sign of adversity. Jesus certainly had not turned back when he had come face-to face-to-face with adversity.