you are talking in circles. Do you understand what the word 'illegal' means? an illegal act is a crime, whether its a civil crime or a criminal crime or a misdemeaner or a felony does not change it from being a crime.
entering the USA illegally is a crime, staying here illegally is a crime. Giving birth does not negate the crime of the mother.
A civil offense such as unlawful presence in the country is illegal but it is not considered a crime because it is a violation of civil statue not a criminal statue. People staying in the country with expired visas such as work permits are charged with illegal present. They can't be fined or imprisoned but they can be deported and they can be barred from reentry. These action are not punishment according SCOTUS but are administrative procedures.
Improper Entry is a crime, however it is misdemeanor not a felony. The punishment is is a fine up to $250 and up 6 mos. in jail. However, these penalties are almost always waived because the fines don't get paid and imprisonment serves no purpose.
My point in this discussion is not that illegal immigrants aren't doing anything wrong. If we want these people treated as criminals, which I don't agree with, we need criminal statues and the cases should be tried in a criminal court.