The vehicle wasn’t driving 100mph because of the cop, it was already doing 100 mph going the wrong way.
If the vehicle made it to oncoming traffic tragedy was inevitable with the possibility of multiple deaths or severe injuries.
The follow up story said the cop was able to turn the car around. He may/probably saved lives.
Causing a high speed chase is one thing and shouldn’t happen, trying to prevent a vehicle from causing certain death and destruction is another thing.
