I agree with you that birtherism was idiotic. Ironically, it didn't actually bother Obama 1 little bit, because as a seasoned politician who understood his base("news" media included), he just sat back and let Trump continue putting his foot in his mouth over the issue, to Obama's benefit!
I'm not aware of Trump saying that "immigrants are coming after your momma" though..... The media and dems have largely lied and intentionally misrepresented Trump's comments on immigration(and on many other issues). The best example is when Trump pointed out the fact that MOST illegal immigrant females are RAPED on their way here.... He talked about the fact that there are obviously a lot of bad people who are committing these rapes. Thats a fact that "progressives", dems and the media SHOULD be greatly concerned with. But they aren't....
Instead of actually reporting on the obvious dangers of illegal immigration, including that most will be raped, the dems and media fabricated the claim that "Trump was calling all Mexicans rapists"! That media claim doesn't even make sense! It's like if Obama said "there's a serious gang problem among young, inner city black men", only for a bunch of hyper-partisan scumbags to falsely claim that "Obama called ALL black people violent gangsters". Only the most blind, naive haters would buy into either of those idiotic stories!
But if the dems, the media and the progressive base truly cared about illegal immigrant women, they wouldn't ignore the problem, and twist it into a dishonest, politically motivated attack on a political enemy! They would be up front and honest about it, and they would WIDELY REPORT IT, so that more Mexican women are made aware of the horrible risks involved in taking that journey!
Instead, they keep it hushed up, they attack Republicans who dare expose it, and they continue encouraging ever MORE women to put themselves in that horrible position, so that eventually the left will have a larger supply of reliable voters here in America!