I think you are on the right path to understanding the situation. The Left began to sound like the Fundamentalist Christians during the Trump presidential campaign. That is the similarity. The Leftist Fundamentalism began, and every sin is counted against everybody (politicians and actors included), even some of their own have fallen.
But the Left isn't used to the weapon they have. They misfire it often. They got some aspects of fundamentalism down, they shun, they publicly accuse and thereby defame, they take any property or job and even wealth away with public blessings because they get so much approval for their trial-by- media crucible.
But that world is seedy. They find they must keep themselves from committing some to heresy, but MOST egregious of their newfound morality is that they have to be hypocrites! That is why they catch themselves fighting their own leaders at times. Sometimes they turn their heads away and pretend there is good reason for a violation. While other times they harm their own cause and commit to the destruction of lives from people who would otherwise be beneficial to them.
The Christian religion has been plagued by their own tendencies to tear themselves apart. Their message is legalistic. Fundamentalism demands rules to be followed that not a lot of people can actually keep. I think that is why the Democrats are going to harm themselves, the hypocrisy is unavoidable in a fundamentalist intolerant system.