som1,
The lie is that she did not call Biden a racist. If anyone heard , please send the source.
(She also did not call him a rapist, which you also did not claim outright.)
She has been critical of Biden’s position on busing to integrate schools and comments he made about segregationist senators, and she has said that she believed women who accused Biden of making them feel uncomfortable.
There are many reasons why she would accept being the VP.
1) Trump is a proud racist and a accused rapist (maybe confirmed if he ever gives his DNA to the court). and she will do what it takes to defeat him.
2) She has personal ambitions and she is willing to look the other way. Similar to how a solid christian like pence can be a vp to a person who is the antithesis of most of what he believes.
3) Maybe she said these things during the campaign for the nomination even though she wasn’t 100% sure because it would help her be the nominee.