I have had this disagreement with Unk for many years now.
He is technically correct, there is no law that makes the parents of a person that is granted automatic citizenship by being born here, also a citizen.
But what he fails to acknowledge, is that folks that are already citizens, (because their criminal illegal parents enabled them to be born here,) can more easily lobby to have their relatives immigrate legally, thus imparting a certain amount of legitimacy to the term anchor baby.
View attachment 1155550
This page describes how you (a U.S. citizen) may petition for certain family members to receive either a Green Card, a fiancé(e) visa or a K-3/K-4 visa based on your relationship. (If your relative wishes to naturalize or obtain proof of citizenship, see the Citizenship section of our website.)...
www.uscis.gov