@Jazzhead I only heard part of his speech. Trump has always been able to 'excite' a crowd much like a famous rockstar is able to 'excite' a crowd. I didn't hear him telling people to riot, but admittedly I didn't listen to the entire speech. As anyone campaigning they say things about their platform against their opponent; taxes, social security, jobs, gun laws, abortion, etc.
IMHO the concern that the left has with Trump is the enormous size of the crowds that he draws and his ability to connect so well with them. No President in history has ever drawn crowds the size that he does. None.
You might want to listen to one of Hillary's speeches (video below) where she shrieks to get her crowd 'excited'. Please watch the video -- the crowd gets excited, roars and shouts. They chant "Hillary" immediately...
@Jazzhead if you honestly see or hear a difference in the tone of the speech or the excitement of the crowd, please, I'd be interested in trying to understand what you see or hear that is so different.
www.youtube.com/watch?v=ZngjbhTEhNk