The devolution of America's culture and demographics is the goal of the Left. They know that the more ignorant, uneducated, government-dependent people there are, the better off their party will be. Eventually they and their children will all be voting Democrats.
The stark proof of the matter is the "one-eighty" that Democrats took on illegal immigration. All Democrats prior to about 2004 decried illegal immigration. They spoke out about the cost of it, the problems it creates in schools, etc., etc., etc. (Parenthetically, one of the REAL problems is the Supreme Court declaring that government benefits CANNOT BE DENIED to people, just because they are in the country illegally. This is a travesty that harms all taxpayers).
Anyway, the Democrats made an about-face on illegal immigration in the mid-2000's, changing from deploring it, to whining about how difficult life is for those "living in the shadows." The DACA fiasco, which President Soetoro first acknowledged was illegal and unconstitutional (unless implement by Congress - which STILL HAS NOT HAPPENED), THEN he tried to do it anyway! And Biden continues, even though it remains illegal and Unconstitutional!