The more ignorant they are about guns, the better for them. If they start using correct terminology, the next thing they'll do is to learn a Glock from an AK-47. After that, they might start realizing that there is no "assault rifle" and that anything black in color with a long barrel and some tacticool accessories does not mean it is a military grade gun. Sooner or later they might realize that restricting magazines and banning any gun that "looks scary" is a stupid proposition and that Obama and cronies are not doing anything to reduce violence in schools and on city streets.
It's a slippery slope for them and it all starts by educating themselves on proper terminology.
Ignorance is bliss, especially for liberal media types.