I can't look at the two clips and then say racist because of the dire contradictions in the two and he was singling out 4 specific people. What I can say about that clip is it is bothersome and
1) Extremely callous and spoken in a hurtful way. I can see why some view it as racist.
2) Unintelligent - By all accounts he was very intelligent so why make your point in a manner that is going to be offensive and obstruct the point trying to be made
3) Arrogant - Again, why speak in a manner that turns people off to the very points your platform is trying to grow.
4) Lacking wisdom - I doubt he knew the backgrounds of all 4 well enough to make such claims
I don't suspect that these are the only two clips that show compassion and sincerity and hurtful. bigoted content. What I haven't been able to determine is, given his ability to reach young people, WHY, outside of $$$ he could go from one extreme to another given his agenda.