It is not about intelligence or integrity. It is a cultural, tribal connection. Emotion not reason. I personally believe a lot of Democrats actually don’t think, for example, Trump colluded with the Russians, but they want the FBI investigation (even if illegal) to continue to destroy Trump. They want their PC culture back in charge. A sort of neutralizing of what America was traditionally, constitutionally; what Trump is trying to bring back, restore. This has been the intellectual, academic left for decades, even before the sixties. You even see this kind of thinking at the Vatican, high academic liberalism. But since Obama it seems like it has become mainstream, the media outlets such as CNN or the NYT or Washington Post, even the BBC, also entertainment, academics. They are now advocates of a particular secular leftist ideology as the moral norm of our society. Immigration is a great example - 5 years ago Democrats supported a wall. Now they are willing to shut down the government for immigrants who come here illegally. Mind boggling. Even if the ideology is false, intolerant, corrupt, hateful, counterproductive, doesn’t matter. Again, think tribe.