Liberals weren't concerned with the consequences of electing Biden to office, because they were only focused on beating Trump. All they cared about was 2020, despite being warned that Biden's election would only ensure that a worse, more effective Trump would come to power. The same is true of 2024.
Its the national committee and other elites who ignore all the warnings, then and now. Even after Bidens scary debate appearance, they seem to think people will forget what they saw with their own eyes.
As a result, liberals have lost (or sacrificed) everything that they claimed they were acting to protect: welfare, abortion rights, labor protections, the environment, democracy, etc. They stand for nothing. Fascism is ascendant because of liberalism's failures.