to be fair, situation is not that simple. the marshals were clearly not equipped to handle the flaming wire. the driver alone was wearing cloths which had some kind of protection against fire. the marshals were just trying to get him away from the fire because nothing could have been done. this is from the times when F1 was not really the safest sport around. things have changed massively. as you can see in the video, they just had one fire extinguisher which ran out of juice within a couple of seconds. they could have done nothing to save him.