They're about stuffing America and America's heritage.
The ugly sequel is that, if they ever get their People's Republic here, Bill Ayers's 25,000,000 dead is just the down payment. They'll kill 200,000,000 people, because they will learn greatly to fear the memory of America and what the American Experiment was, and it will take killing that many people to wipe out the memory. What's left will be 100% "minorities", all of them thoroughly Sovietized and most of them the children of illegal immigrants.
"Anchor babies" are at the very heart of the the "Natural Born Citizen" controversy, so efficiently swept under the MSM rug.
Rather than an "NBC" being defined as the child of two citizens, an all-out effort is being made to include any "native born" person in the POTUS-eligible category. The Electoral College vote for Obama was nothing less than a de facto Constitutional amendment.