Right, but there's a term for that, sports car.
Which is still a car. And the point remains that both those things the men are carrying and those things you think of when you see a hunter are basically the same, with only cosmetic differences, and both are called rifles.
Plus when you google "rifle", google will show some assault rifles as well, which the uninformed will quite easily conclude that the weapons they saw earlier refereed to as rifles, were assault rifles.
Assault rifles are rifles, just as sports cars are cars. Again, as I stated earlier, the salient detail about assault rifles is the ability to fire multiple rounds with a single trigger pull, which no, won't show up well on pictures.
So "assault weapon" is an aesthetic distinction. Nothing wrong with that. Its a pretty useful distinction too, since the aesthetic is presumably important to the people carrying those guns. Or we can come up with a new term for "rifle made to resemble assault rifle". In either case, it seems like it would be useful to have a way to distinguished a regular looking hunting rifle, and the kind the people above are wielding.
Again, this is sort of like two people meeting together to discuss a hazardous crosswalk; one says the street should be closed, so there won't be any cars that might hit people. The other says no, people need to commute to work, we need to educate them on how to drive safely. In the end, they ban all the red cars.
And I think we've reached beyond simple clarification, where we ought to break this off into a new topic if we want to continue :)