His own lawyers argued successfully in a defamation case against him that he's a liar by reputation and no one with half abrain should take him seriously.
Alex Jones, too, in his custody case claimed that he really didn't believe all the bullshit he shovelled on his show, but it was for entertainment purposes. How this became a valid excuse, I have no idea.
LAST YEAR A JUDGE RULED THAT THE "'GENERAL TENOR' OF (THE TUCKER CARLSON) SHOW SHOULD THEN INFORM A VIEWER THAT [CARLSON] IS NOT 'STATING ACTUAL FACTS' ABOUT THE TOPICS HE DISCUSSES AND IS INSTEAD ENGAGING IN 'EXAGGERATION' AND 'NON-LITERAL COMMENTARY.'"; "FOX PERSUASIVELY ARGUES, THAT GIVEN MR. CARLSON'S REPUTATION, ANY REASONABLE VIEWER 'ARRIVE WITH AN APPROPRIATE AMOUNT OF SKEPTICISM' ABOUT THE STATEMENT HE MAKES."