There's really no other answer as they have forgotten the lessons of their forebearers. When the working class can take no more they do not die, they kill. They don't mean to, they don't want to, they would rather slowly die than kill, but they kill all the same.
Employers used to be dragged out into the street along with their family and beat to death in front of their family if they failed to provide a fair deal to their employees; even as capital paid for protection in the military or police, that did nothing to stop the workers, as workers are not slaves and are not raised to understand themselves as such.
As capital once again ruins the good will that keeps it alive, this will just happen more and more. It takes one bad day to make a good person decide that suicide is not an adventure for a single person.
Yes, Harris said multiple times that she would continue Biden's policies. It's one of the main reasons she lost, besides being one of the worst political candidates in US history. So in effect, Biden was running for reelection.