Can one of her suporters tell me, what is this???

[gratuitous]

17. "It does not mean abolish deportation."

Well, the initial word, "It" refers back to the first part of the post, "Abolish ICE."

"does not mean" is a continuation of the first part, in which Alexandria Ocasio-Cortez contrasts what she's about to say with what she said before. Just so you don't lose track, what she said before was that by abolishing ICE, she would like there not to be a government agency that incarcerates children (those are minors, people who haven't turned 18 years old yet) and sexually assaults women (which can mean any action against a woman on a spectrum of assaultive behaviors having to do with forcible contact). "With impunity" means without consequence or punishment.

Back to the statement. By "does not mean" is followed by "abolish deportation." So she is saying that whereas she wants to do away with a government agency that incarcerates children and sexually assaults women with impunity (see previous paragraph for explanation of those terms), she does not mean that she wants to abolish deportation. That probably refers to the legal framework for an immigration policy that includes deportation of certain individuals for failing to follow the statutes for legally immigrating to the United States. That would include due process, including a hearing, submission of evidence and testimony, and a ruling according to the law by a judge or magistrate.

We good? Or is there something else you don't understand or that you would like to read into it?