Is the mantra "the personal is political" destroying the Democratic party?

[Politician]

Identity politics is in overdrive now, tearing apart the Democratic party. It started during the feminist movement of the 1960s, which argued that the public/private divide was fictitious, and that the personal is political. This means that you can no longer disagree with someone regarding their ideas or positions, because it is illegitimate to try to parse out a person's characteristics--race, sex, class, disability, sexual orientation, and so forth--from the positions they hold. In other words, if you criticize a black person for their ideas you are also critizing them for being black. Remember, the mantra is "the personal is political." So now everything happening in the democratic party boils down to racism or sexism, and this situation has been generated by liberalism itself. We are paying the costs for a deeply misguided philosophy, and identity politics is coming home to roost. We are all really screwed, because we have done this to ourselves.