Sorry that happened to you...some people are just big ***holes and thats all there is to it.
I had a simular encounter walking to my car when two crop-top bleach blonde 20somethings pointed and laughed at me and my gut clenched up.
I just gave them my best crazy look and freaked them out but honestly wanted to pound them both.
You handled it soooo good!! I like to say to people like that "GOD I feel sorry for you!" that freaks them out also *lol*
Your doing so well for your health, to heck with them I say!
Nibby