I agree that DUI laws could be harsher,but think if there were no laws for drinking and driving.Does it stop everyone from doing it,no it doesn't but it does keep a greater number of people from doing it.Those repeat offenders will usually continue until they kill others or themselves.I feel repeat offenders should face a sentence equal to that of murder,but instead states regulate themselves and sadly do not address penaltys at the same levels.When a drunk driver gets behind the wheel chances are they have not made plans weeks in advance to use their car to kill people.If 2 drunk drivers planed to smash their cars of the same type into a theater and nightclub,killing and wounding nearly 200 people within a few minutes the laws would have to change to try to prevent these "automobile terrorists" from killing children in schools,workplaces,theaters,nightclubs ect.Would it be guarantee that it wouldn't happen again?No it wouldn't,but it could keep that model of car that's capable of being used to kill innocent people out of the hands of those who purchase it for the sole purpose of killing as many people as possible in mere minutes,or stop the production of cars that are intended to kill.
Other items are weapons yes,but they are not able to kill many people within reach in 1 or two minutes.Should we regulate all of those,if hammers for example were becoming a source of frequent mass murders of dozens of people surprise attacks,we would have to change policies on who buys or sells hammers.Thus the reason for the TSA.box cutters,hammers,scissors,lighters ect are forbiden on planes.Does it work?maybe yes because since 9/11 nobody has breached the cockpit or hijacked planes.A pain in the ass to wait in screening lines.
The ideal of "tighter regulations won't stop it from happening so there isn't reason to put new laws in place" isn't an option... We must add reasonable ideas that make it harder to get certain military style weapons,and stiffer penalties for offenders who shouldn't have guns but do,for people that purchase guns for others.If the penaltys were a mandatory 30 years for example it would make some,not all people,unwilling to take any part in that kind of activity.
There are failures in any system but a person who was on terrorist watch list should have been stripped of their ability to have any access to guns,pistols,rifles ect.That information should've been nation wide and then unable to pass a background TEST & CHECK