German media said the driver deliberately broke through plastic barriers set up by police around the parade area, where 1,500 people were expected to gather.
driver is lucky to be alive
“One witness, Elmar Schulten, told Bild that he saw “many small children” on the ground. Police had to protect the driver as carnival marchers, including parents of some of those injured, rushed furiously towards him, Schulten said.”
Sounds like it would have been an appropriate application of the "he needed killing" defense.
Until all cars are banned and confiscated, this type of thing is going to continue to keep happening. A sane society would not allow anyone to own a car.