Uncalled for behavior

An ambulance came blazing with sirens on a two lane road and all in the middle of a traffic jam. I blogged a truck on my left to make way for it and it followed me. After passing the truck we were both on the outer lane with him in front, he hard stopped and switched off his sirens. I flicked my lights wondering what he was doing, he drove off then suddenly stopped again and I crashed into him(Airbags and all popping). I learnt from one of his assistant that he did that intentionally saying why I was following him, that he braked with his handbrake so I'd delay to stop not seeing any brake lights. The so called supervisor and started saying she they like to tailgate(I'm sure it referred to being black). If I had a short fuse could've fought back. I've also learned that this is usually what happens with ER24 ambulances and mostly with taxi drivers. I assisted in making way for him and now my car is totaled(write off).