So Hillary, whose mentor was Grand Wizard Robert Byrd, hurls accusations at Trump because some no name KKK members like him. Well, who has endorsed Hillary? The Communist Party has, for a start. Did Hillary "disavow" their endorsement?
Going by the "flak is always heaviest directly over the target" axiom, we see that the alt-right phenomenon is something they are afraid of. It has in many ways inverted everything, by showing that the Right can be the ideological home of young, alternative, wry, mischievous (to quote Yiannopoulos) people. The Right isn't just starched shirt, suit and tie, hairsprayed coif, sticks in the mud. As Milo frequently points out, these days if you are rebellious sort, a free thinker, a contrarian, countercultural, then your ideological home is very much on the Right end of the spectrum. The Left is dogmatic and doctrinaire, it is "the Man" and "the System" at every level, and it has been for over 50 years now.
I heard some of her speech denouncing the alt-right phenomenon, and what I heard was desperation.