To describe it as a Nazi salute is absurd. Absolutely absurd. She was holding up her hand to the people in the media booths. Who cares if she waved her hand back and forth a few inches. It was perfectly natural, and I've certainly seen people do that in all kinds of situations. In fact, I do it almost every day when I'm driving and somebody flashes his lights at me to let me make a turn in front of them. The reason is that waving back and forth takes more effort, both physical and mental.
What makes the Nazi salute distinctive, by the way, is having one's arm and hand ramrod straight so that the fingertips, wrist, elbow, and shoulder are collinear. Anything outside of that is just an acknowledgement of another person's presence.