For “illegal aliens” think “Mexican citizens”.
Their reason for fearing legal guns goes back to two horrific and bloody civil wars, one at the start of the 19th Century, and the other at the start of the 20th Century.
Going back even further, Mexico and countries south of there suffer from “Old Europe disease”, which still afflicts them today. It is the feudal outlook, that there are only two classes of people: the rich and powerful, and the poor peasants.
This really hurts people and leaves long lasting hatreds.
In Europe it is why dog licenses for large dogs are incredibly expensive, because before, only the rich and powerful could own large dogs.
But back to the point. The only people who could have guns in old Mexico were the wealthy and the banditos, later revolutionaries. And both the government of the wealthy, and the banditos, were utterly savage to the peasants not loyal to them.
Many times, a large group of peasants would be met by men on horseback, who would demand to know who’s side they were on. Any who answered incorrectly would be killed on the spot.
In any event, it resulted in cultural trauma to most Mexicans. And guns are part of the focus to that trauma.
HOWEVER, (and a big however), Mexicans are flexible enough to learn better. While those newly entering the US are still very frightened of things like the murderous drug cartels, once they adapt to the US, and understand that “guns are for the people, not just the ‘masters’, the rich people”, things will change.
This is why gun liberty organizations need to make a serious and extended push to convince Hispanics to join the rest of us as legal gun owners. And for the same reasons that we have guns.
Of course this means Hispanics who are citizens, not illegal aliens. But if the government waves its wand and makes the illegals, legal, then gun rights organizations should be “Johnny on the spot” to teach them about gun rights and liberties. An outreach of enormous size, not just to men, but also to women.
Right now it is a problem, but it soon could be an opportunity. All it takes is to change minds.
We don't need this in our country. Can you imagine any American at any point in history referring to an employer this way? It's why we are indomitable, or used to be.
Some of these conservative movie producers should do a film about just the history you describe. An epic saga about families of Mexican peasants and their persecution by the elite. It would appeal to their heritage, destroy the guns-are-bad myth and if made well and marketed right could be a hit with the Hispanic community.