The courts are a bit split on this. Recently in illinois a judge found an illegal immigrant is not a prohibited person if they meet some standard of community ties/integration, although I've totally forgotten what criteria the judge used.
Remember that the McDonald case incorporated the second amendment to the states so the judges have to decide these sorts of questions for people who are out of status.
I mean criminals: people convicted of a crime for which one of the punishments is revocation of gun ownership rights.
The important word here is convicted. As we were all taught in elementary school - there is a process required by the constitution in which a person goes to a special meeting (called a trial) where a whole bunch of people examine evidence and ask a lot of questions about that evidence to determine if a person is a criminal. If the decisions is they are a criminal, then they have been convicted. HTH!
You do not need to be convicted, you do not even need to be charged.
Since this is a hot topic, look at Abrego Garcia. His wife filed a restraining order. The initial order was slightly different than the temporary order 3 days later, which added one thing -- surrendering any firearms (this is bog standard, they do this in Maryland even for citizens). No matter that she did not even bother to show up for the adversarial final order, so he had his gun rights taken totally ex-parte without even a criminal charge or a fully adjudicated civil order nor any chance to face his accuser wife. Even david lettermen had his gun rights temporarily revoked because a woman in another state claimed he was harassing through her TV via secret messages in his television program [].
But that's not all, you can totally have gun rights taken away without any civil or criminal process. If you use illegal drugs, you cannot own weapons either, that is established without any due process to decide if you use or not, simply putting down you use marijuana on a 4473 will block a sale as will simply owning a marijuana card whether you use marijuana or not.
This is exactly my point, and what I've been driving at in this thread.
This could not possibly be a concern based on abrogation of due process - because there have been many similar due process violations concerning firearms, and I've never seen a single article submitted here about those.
Frankly, I don't see how immigration is any more relevant to this site than civil rights.
first knee jerk type answer is that there are a lot of people in the tech industry that are here on some sort of visa and are not citizens which means that they very much are subject to any changes to immigration enforcement.