If they disagree with voter fraud, cool. That's on them. But don't EVER back down when you KNOW this to be true.
There's a time for soft diplomacy. There's a time for just throwing it in their faces and seeing where it lands. Grab your fucking nuts and have difficult conversations. STOP self-censoring. Conflict is GOOD. (Please, again, don't view this as a call to random violence)
You can intellectualize voter fraud and get into an argument about the size of this or that. STOP. We KNOW it happened ALL ACROSS the country. Stand by it, EVEN if they want to call you crazy. WHO CARES.
You can't convince them. The best way is to give light hearted jokes with the truth sprinkled on. When the all questions have some articles pulled up from cnn or nyt if possible.