Was it my fault?

So as I was walking there was a mom with her daughter claiming they would open the door (they did). So I let her open it even though I did not ask to open it. I said thank you for opening the door right then the next door she said her daughter should go in first because she’s opening it for her and I understand that but someone else decided it was a good idea to go inside before her even when she said not to. So I followed them because I did not want them to get hurt because I can’t trust no one. She got all mad saying we should have manners and wait for the person that’s opening the door to go in first. I never heard that manner until today and you know not all people was taught manners. At that moment I was stunned because of the behavior. I was frightened so I did not speak another word back scare she’d do something back. Not until I noticed she was following us to the place we lived in so that creeped me out. She starts shouting at use for being badly raised. Was it my fault? No. Did I ask? No. What’s her deal!? This may sound foolish but I thought it was a interesting story to tell. Good for me I had everything recorded and it saved. I don’t know what I will do with it but it’s memorable. I hope I don’t see her again and he daughter too because they literally are so scary. PS ( sorry for writing for so long you don’t have to read it if you don’t want to ).