Earlier quoted context omitted.
No country on Earth affords equal rights to citizens and non-citizens. If this "terrifies" you, I encourage you to reflect on your fears and whether some of them may be disproportionate to reality.
Everyone should have basic protections, or "fundamental" rights. Those are things that exist as a matter of basic human decency. Nonbasic rights are more like privileges, and they can apply discriminately.
"... The panel affirmed a conviction for possessing a firearm while being an alien unlawfully in the United States in violation of 18 U.S.C. § 922(g)(5)(A)."
http://cdn.ca9.uscourts.gov/datastore/opinions/2019/01/08/15...