Even though Bernie appeared to have the momentum going into South Carolina, what went wrong?

What made black voters think differently when it came to preferring Biden over Bernie/Warren? 

What effect did South Carolina have in decisively making lopsided Biden margins in states like Virginia?

Why did voters still not vote for Bernie or Warren in general?  

How is Bernie vs Hillary different? 

1. I feel that numerous mistakes were made in assuming most democratic voters agree with all or bust ideas in both 2016-2020. 

2. Also, not convincing voters that Bernie would do better in general elections was part of it. 

3. Feeling convinced national and swing state polling showing Biden being better than Bernie was part of it as well. 

Thanks for all your honest feedback. I will keep on editing as needed! Especially since I am learning more that people on this site have very different perspectives about how democratic politics works.

I do care and empathize that I don’t always do things right when it comes to constructive clear communication and conversation that leads to meaningful social change for progressive anti corruption causes.