question about USA roundabouts

Picture for reference. If I’m the red and I’m approaching the roundabout, do I have to yield to the blue even though they’re not going to cross over in front of me? They say to yield to all traffic in the roundabout, so should I just assume that this person is going to cross in front of me all the time?

other cars don’t seem to yield and assume that the car isn’t going to cross in front of them. I often see cars, suddenly stopping behind me when I yield to traffic like blue as if they did not expect me to stop and it makes me nervous.

Picture for reference. If I’m the red and I’m approaching the roundabout, do I have to yield to the blue even though they’re not going to cross over in front of me? They say to yield to all traffic in the roundabout, so should I just assume that this person is going to cross in front of me all the time?

other cars don’t seem to yield and assume that the car isn’t going to cross in front of them. I often see cars, suddenly stopping behind me when I yield to traffic like blue as if they did not expect me to stop and it makes me nervous.