One of the side effects of more restrictive gun laws is that in countries with such laws, terrorists reach for slower moving, but much larger caliber and just as deadly, projectile weaponry to commit their mayhem (i.e., motor vehicles).
We had terrorists blowing up the UK from the 70s onwards (and before really) with bombs. Very few events where someone uses a car to kill someone for political purposes though.
Someone found guilty of causing death by dangerous driving usually get far lighter sentences than those found guilty of causing death by manslaughter, and the majority of car drivers that cause death don't even get charged
