I would be annoyed if my friends changed plans without telling me, then decided not to wait for me to reach the new location. What would make me furious would be being abandoned at night in an unfamiliar area. While I have the cognitive ability to find things on my own, to me this shows a complete lack of care and concern about my safety (and essentially me). I would never do this to a friend (especially a young woman), even if she was familiar with the area. Growing up, I was always taught that it is very dangerous for a young woman to walk around the city at night by herself. My other friends were taught the same thing- if the person was in our group we would always make sure they got to their destination safely. If something happened to her, we'd never be able to forgive ourselves.
OP, did these friends at least call you the next day to make sure you had gotten home safely? If not, then in my opinion you should find another group of friends to hang out with. These people at best are too easily intimidated by someone else and will not stick up for you, even if it means compromising your safety. No advice on how to speak to them- if it were me, I'd just not make anymore plans with them again and treat them more like acquaintances from then on.