Not trolling, trucks are not knifes nor are they guns. How many can you kill with a knife rather than a rifle? If those ISIS blokes in London had AR-15s how many would have died? Knifes require the personal touch.
Check Australia's murder with guns after the Port Arthur massacre. See also Dunblane in the UK after young kids where killed in a school, also rates dropped.
Pleased I do not live in your country.
BTW not alt-left; I prefer Social Democrat.