All political parties have their Kool-Aid drinkers, those die hards who willingly ignore all the evidence against their beliefs and take one for the team.
I remember in the Johnson-Goldwater election in 1964 meeting an old Greenfield butcher who spent his day telling everyone he met that Barry Goldwater was mentally deranged and had spent time institutionalized. The claim originated with a totally unscientific poll a magazine had taken of psychologist and became accepted wisdom. After the election Goldwater sued and won.
So the question arises, how do you know if you’re one of the Kool-Aid drinkers, that you would drink the cyanide laced beverage for the sake of your tribe? The answer was just made very easy. If when you look at the photo of Michelle Obama embracing George W. Bush and don’t see a high degree of tolerance and civility, you would reach for the paper cup.