I'm not sure about the majority of the population, but I have a twist on this question: Police,Firefighters,EMT's,paramedics,nurses,Dr's have a "duty to act", does that mean helping someone that has just tried harming you? I don't know.
But I can say that I don't think I would help them, then again that may change since I've never been in that situation so I really don't know how I would act.