I think one thing that is happening in America is extreme polarization. I see your commentary as kind of extreme. I don't think Bill Clinton was a racist, or even pandered to racists, but you seem to condemn his actions. (Perhaps I misunderstand, but that's what it seems. I don't want to put words in your mouth. I'm just giving an impression.)
Perhaps you aren't listening to the same people, then. That Reagan slashed funding to "urban" areas, and funneled fund to whiter areas, and that he worked to dismantle civil rights, isn't really up for debate. That people still remember Hillary's "superpredator" comment, and still hated it, should be obvious to anyone that was paying attention to young and minority voters - even after she apologized, protestors were still showing up with signs reading "I am not a superpredator." And Bill Clinton was widely seen as pandering to racists even back in 1992.
Again, a lot of the dem base is simply not here for that garbage any more. And in truth, a large part of that is a reaction to the weekly videos of black people being attacked by police without justification, and the rise of bigotry on social media. Black Lives Matter, for example, is ultimately a reaction to seeing Trayvon Martin murdered by a racist vigilante, and then watching many people (mostly but not entirely conservative) rush to insult Martin.
However, perhaps Bill Clinton's deliberate courting of the center would be enough today to lose the nomination fight. Hillary seemed to move a bit left to counter a fight against Bernie Sanders.
Truth is that Sanders lost because he ran a crappy campaign. He was unable to discuss much of anything outside Wall St., he completely failed to court nonwhite voters, and he basically skipped the south entirely. Regardless of why he did this, he wasn't much of an opponent.
The Republicans are much more extreme in this regard. I think it would have been very difficult for a reasonable Republican to get the nomination this year. I think you have to be a demagogue, if not an outright kook. I find this troubling. I fear that we will face a choice of extremists for a while.
Trump had many benefits (and still couldn't get a majority in either primaries or general election), including massive free press, a strange reluctance to call out clear bigotry for what it is, and Comey's interference. And even then, she lost by thin margins in a handful of states - basically, an anomaly. Your suggestion would have crushed her support, for no gain.