Are we reading the same page?

The most recent attack listed in my source was in March of this year and killed six.

https://en.wikipedia.org/wiki/Zaoyang_car_attack

And that's just the last time someone added one to the page. I doubt the list is comprehensive or that was the last attack.

He clearly meant the last attack on American soil.

I think we all agree American murderers prefer to use guns rather than vehicles or acid. That's our culture. But it's not worse than other cultures where murderers prefer to use acid or knives or vehicles or bombs.

It's a pragmatic preference, not a cultural one: guns are much better murder weapons than cars.