All of Biden's behavior in the video, though it's disturbing and could be considered molestation, is "minor". I'd imagine the politicians would rather ignore it than drop a bombshell of an accusation against a presidential candidate only for people to say "that's just how Joe is".

I'll disagree with you that this is an older generation's or Southern way of touching. Maybe with family members but not strangers' children. I know in the north if an older man who is a stranger starts stroking a child's face or placing his hand on their chest, you get him the hell away from the kid.

Also anytime an accuser comes forward they are attacked and discredited. I doubt anybody listened to the interview in the OP, but she herself talks about how she was called a Russian operative when she found the courage to come forward.