Let's try putting the shoe on the other foot.
If you move illegally to Mexico, or better yet a country that allows its citizens to own firearms, do you think you will allowed the RKBA?
Law of Nature says you have the right to self defense, but I'm willing to bet that there is not a single country on the planet that allows illegal aliens to carry or even own firearms.
And do you know why that is? Because it doesn't make sense to allow armed trespassers onto one's land. It doesn't matter if we're talking about an individual's back yard or the entire landmass of a sovereign state. Trespassers have no rights on land they are trespassing on, and armed trespassing, by definition is an INVASION. It doesn't make sense to pass laws that facilitate such an event.
Preservation of one's life is somthing everyone has a right to, on this point the Law of Nature trumps all. Society is not based on the Law of Nature, however. Society is based on the Law of Man, which is specifically (in the case of the USA) designed to protect the CITIZEN. There is no reason what-so-ever for our laws to protect illegal residents. There is certainly no reason for our laws to allow illegal residents to become INVADERS with a single legalized purchase.
The pro-illegals out there will state the obvious, that the Law of Nature trumps all; and to them I say "That's true, but the Law of Man is enforced by men, men who want to preserve more than just their lives, but their WAY OF LIVING. And when push comes to shove, those men and their weapons have the Law of Nature to back up the Law of Man".
Illegals want guns, they can get them, just not through legal mean. Ya takes your chances and you do your time. It's a shame we can't deter them with more than catch and release...oh wait, Law of Nature says we can