Democrats are Machiavellian in their views about politics, when in their view they are right and Republicans are not only wrong but evil then the ends justify the most in the last few days Democrats have called Republicans fascists, garbage and Hitler admirers and have convinced many of their supporters it’s true
Their voters in many ways are emotional wrecks who can be manipulated into action including violence if need be
It makes sense that they're praising George W. Bush nowadays. All he had to do was to decline to endorse Trump.