Eh agree in part, disagree in part. In 2016 a bunch of people who would otherwise not be interested in politics were interested in two politicians - Donald Trump and Bernie Sanders. The Democratic party leadership made a concerted effort to drown Sanders' economic populism before it could succeed. That sent a message that it had no place in the party, killing their ability to grow the base, and giving MAGA (via the Bannon faction) control of economic populist messaging. Economic populists left the Democratic party, leaving them to rely on elites and cultural leftists to carry the party messaging, which resulted in what you described. And most of what you described only exists in a Fox News fever dream, but the Democrats opened the door right up for it to happen.