Why wasn't it a problem for THEIR PARENTS to come to America? Their parents were adults and had never been in America before they arrived.
Every year, hundreds of thousands of young people come to America to study in school and university. They have no problem traveling to a country they have never been to before.
What's wrong with the Dreamers? Send them back to Mexico with their parents...so their parents can change their diapers!
These kids all speak English and have a good education. They should be in great demand for jobs in their home countries. Not to mention they likely have large extended families there.