Calling them out also will not work. Modern republicanism hinges on Democrats being the enemy. It is a belief that lacks any specific evidence, but the idea has been repeated so many times through accusations with no evidence, predictions that never come to fruition, and outright lies that never get corrected that from the perspective of a Republican, even if some single allegation is proven false, they are hearing so many bad things about their countrymen that some of it has to be true.
The Russians perfected this type of propaganda and it is based on a couple quirks in how our brains work. First, even a wacky lie pushes your beliefs in the direction of the lie. Second, if a lie is repeated it is more likely to be believed. Wrap this up in a major media ecosystem that says over and over “You can’t trust other sources of information. Here are 10 reasons Democrats are pedophiles” and you have armed people storming into pizza shops searching for children locked in a basement that doesn’t exist.
The final quirk of our brains that sort of seals the deal is that direct contradictory evidence to a belief does not weaken the belief, it makes it stronger. The believer rationalizes a defense of the belief in light of the contradictory evidence. Changing someone’s beliefs requires an effort akin to cult deprogramming.