I think you mean illegal criminals. I hate that term "undocumented aliens". They're all criminals, breaking our laws just by sneaking into our country. Try that in North Korea or Iran, among other countries, and you could be shot or certainly subject to torture in a prison.
You are right in saying they're a big threat. Huge threat to our nation.
Cv19, cv19vx and illegal immigration are all a part of the same plan