I think allegations without any real backbone to them get exposed pretty quickly. As an example the false allegations about Moore that were being pushed to the Wapo by Project Veritas in an attempt to trip up the newspaper.
I hear your concerns about weaponised sabotage, but making such a claim is not without risk. Even genuine victims/whistleblowers have their lives made a misery upon going public. How much higher would the reputational or occupational damage be to someone caught in a falsehood? Now that I ask that I’m forced to consider that it could be lower, such is the topsy turvy nature of society.
As video technology improves we could see a rush of near flawless fakes hit. That will be bad.
Stop, no. But if he doesn’t have the dignity to withdraw he should be running without support, the national arm got that right the first time even while the local wing went to a crazy place. The RNC diving back in now after the allegations have only gained credibility mirrors what they did for Trump though. They fled, and then crawled back.
If memory serves when David Duke won a primary the RNC pulled support, and the then Republican President endorsed his Democrat opponent in the election.