You've connected to very unrelated things unjustifiably - Immigrants and criminals
This is why advocates have always tried to reframe things from "illegal" to "undocumented"
It's actually not a crime to overstay a visa or to be here without one. It's nothing.
The act of crossing the border "illegally" is a misdemeanor (the first time) on the level of something like a speeding ticket - but its still not illegal to be here even if you crossed "illegally"
This is why advocates have always tried to reframe things from "illegal" to "undocumented"
It's actually not a crime to overstay a visa or to be here without one. It's nothing.
The act of crossing the border "illegally" is a misdemeanor (the first time) on the level of something like a speeding ticket - but its still not illegal to be here even if you crossed "illegally"