Why, I wonder, is it easier for a terrorist to cross our border than it is for a Canadian cow?
As best I can recall, Canadian cows didn’t kill 3000 people in one day. I’m fairly sure that if they had, I would have heard about it at some point. That’s the kind of story that they called newsworthy back in the day.
There is no need for terrorists to cross into America at all. There are camps in the U.S. that a quite self-sufficient.