I think a lot of the people that say they "hate nursing" really hate what nursing has become. A lot of people that "hate their jobs" go into nursing to do patient care, and are given more patients then they can handle combined with tons of paperwork.
So of course they'll be mad - it's not what they bargained for. I'm not even a nurse and have more sense than that. It's so easy to say, "oh, that nurse hates her job, she should so get out of nursing", and so difficult to be that nurse, who may have little ones at home, or an abusive husband, or whatever, and have no feasible way to escape that job. Americans especially don't like doing stuff they hate, in general. Most don't stay in a job they hate because they ENJOY hating their jobs.
I think the pre-nurses and nursing students here (and MAs) all need to take a deep breath and remember that you may not understand until you spend some time in the other person's shoes - for all you know, the nurse is having a bad day because her husband just died. Her parents died. She was in a car crash. Everyone has baggage, and it's awesome to think that it'll never affect you, but that is very unlikely to be the case.