Why? Because they broke the law entering illegally and they are not citizens. Sure, if they broke a law like rape, murder, burglary, etc, they are to be presumed innocent until found guilty in a court.
But if they are detained and can’t produce ID that can be used to verify LEGAL immigration status, then, no…they are subject to deportation.
You guys just want to clog up the courts for the next 200 years.
Let me put it this way… they should be treated just like we would if we were to sneak into another sovereign country.