I don't think it's a "conspiracy" but I definitely think all of these accusations were completely made up in order to prevent Kavanaugh from being appointed, and used by Democrats in order to potentially block his nomination and perhaps make sure Republicans could appoint one fewer SCOTUS justice.
Even if it was completely made up, approving of people in positions of power openly mocking sexual assault claims contributes to a culture of silencing real sexual assault victims.
I will bet any amount of money that DavidB and the vast majority of full-throated Kav supporters do not care about silencing real sexual assault victims. Once sexual assault survivors took a side in the culture wars against their own side, the plights of these people became the collateral damage in ensuring that the other side was defeated.