While I agree, it simply does not make sense.
Most people don't pay attention to politics like Freepers do. What they know about Roy Moore vis a vis these allegations is what they heard on the evening news. And what they heard was Republican Senators trashing their candidate right and left. They heard 'conservative' pundits trashing him, they saw Sean Hannity cross examine him like he was some kind of DA in a rape trial.
It was an uphill battle to get normal, rank and file folks excited about a candidate like Roy Moore.