Because liberals are also liars who cannot stop lying, as is the American government and the American media and the American education system and on and on an on...
Why can’t liberals accept that Hillary Clinton is a liar who can’t stop lying?
Because that is the basis for the Democrat Party. Jacksonian Democrats are by their own definition liars, thieves, malfeasance in office since Jackson. Their history is one of dishonest actions since inception. Anyone that has read up on the history of this corrupt party would reject their very existence.