If a emergency vehicle crosses a red light and hits a car coming in on a green light, who is to blame?
If you want to drive safely adopt the idea that if you hit something, or get hit by something, regardless of lights, you are to blame. People run red lights, do stupid stuff, come out of nowhere. It’s your responsibility to yourself, your passengers, the people around you, to avoid those things. As for emergency vehicles, they ALWAYS have the right of way. Lights and sirens help to alert you, but they are usually NOT required to have them on in order to preserve their right of way over your vehicle, regardless of traffic lights.