When the other side is coming from a position of "the only way we lose is if there's fraud" then in what way is it not a waste of time to talk to these people about fraud? It's the same mindset that they handle their religion with. It's not based on fact; it's based on feeling. It's not based on proving a positive; it's based on you not being able to prove a negative.
Let them sulk and wallow in their conspiracy theories. It will only hurt them and make them weaker, which will be better for our country in the long run.