If you are in the US illegally, you are subject to deportation by the government, subject to the condition that you have constitutional due process to prove that you are in fact in the US legally.
If you are here illegally, you will not be able to prove you are here legally, and you are subject to deportation.
That is the law.
You may not like the law, but that is the law.
Until Obama decided to take it upon himself to rewrite the law and make special exceptions for Dreamers.
Because he chose not to do this through Congress, the Executive Order was always subject to being reversed by the next President, because what Obama did was not passed into law via Congress.
That is how the Constitution works.
In the US illegal immigrants are protected by the constitution and are then sent to court to determine their sentence (hence why sanctuary cities exist, which is legal). Illegals have rights, there is no debate on the subject.
Dreamers was a modern move with DACA but illegal immigrants had rights within the Constitution even before Obama was born.