It doesn't matter if she shames his voters. They were already decided long ago and locked in, her words aren't for their consumption. Her words are to associate ideas of extremeism and radical opinions with trump voters, solidifying in the minds of the people her words are really for that trump and his ilk are dangerous lunatics. And many of those people, if she says it enough, will start to associate those two things together and forget exactly who said it provided she backs off just before the election.
Clinton is playing strategy. Which is smart.
Trump is being... Trump... Which is very very effective for a certain portion of the public, most of whom were already republicans. And it's what got him the nomination. Problem is he's still being trump and his only apparent strategy is his delusions that his fanatic base is much larger than it really is.
Trump has two things going for him.
1. He's not Clinton.
2. He's not a politician.
Both of those wielded effectively could be very powerful. But I think trump thinks he's smarter than his political advisors and strategists and isn't listening to them. And I think he will lose because of it.
In my opinion, if trump were better at political strategy, he would drop all personal attacks and threatsagainst Clinton and shift towards a more positive message. Tell people that he respects Clinton as his opponent for president, but keep reenforcing how much of a career politician it is. At the same time, separately, enforce a message that career politicians have ruined this country and the country needs a president they'll think for himself. And that that person is him. Let people remember why they don't trust Clinton and keep reenforcing what appeals to people about him, but in a way that will work to win the presidency rather than the nomination. And absolutely do not insult Clinton or bring up bills affairs or anything like that.
All it looks like is more childish whining "wha mom the moderators weren't fair to me" "wha she was involved in sex scandles first!". Shit like that. It's just making the problems with his own scandle more memorable and believable.
And absolutely DO NOT threaten to see Clinton jailed. One uniting force among both sides of politics is both tend to support their own ideas about what the constitution and what America means to them. And while both sides have different interpretations, the thought of a president locking up people he doesn't like (and even if he didn't say that, that's how it's remembered) is highly unappealing to the moderates of both sides.