Why would they? Their support of his station is transactional, as it should be.
Why should Dems support the opposition party in and of itself? They're shit heels the majority of the time, and the support this round was just because he played ball.
Probably the Ukrainian funding the MAGAs are trying to oust him for.
But yeah I guess the existence of an empty impeachment inquiry that is going nowhere probably means the democratic party are full of suckers that don't know what they're doing, and MAGAs trying to remove Johnson just because they're so wacky wacka flacka.
Even if we "win", we still ain't winning. It's the illusion of choice.
Until we fix at least one of the political parties or get a viable 3rd, we won't get dirty money out of politics, because the people who take it keep getting these leadership positions.