Democrats believe they are allowed to lose an election, but they’re never allowed to lose power.
They can tolerate a Republican president, but only so long as the administrative state remains progressive, the universities remain progressive, the corporate HR departments remain progressive, the civil-rights bureaucracy remains progressive, the courts continue issuing progressive rulings, the progressive NGOs remain funded, and the media continues using progressivism as the lens through which everything is judged.
But if a Republican coalition ever tries to dismantle those things, then Democrats immediately drop all the rhetoric about “democracy” and start calling it fascism, authoritarianism, White supremacy, Christian nationalism, or any other term they can throw at the wall in order to morally delegitimize what’s happening, even if a majority of the electorate voted for it.