I totally agree that that's who Democratic politicians are, for the most part, and it's what they do. No doubt. But one need look no further than the 2016 Democratic primaries to see that it's not a message that they run on, or a message that appeals to the Democratic base across the coalition. The Democrats are divided ideologically between an identify-left and an economic-left, and the identify-left is very self-consciously a coalition of diverse groups. What's the unifying message -- or the unifying anything -- that binds all voters to the Democratic, despite their differences? It's the party you vote for if you can be bothered to engage in electoral politics in the United States, and you're on the left. That's hardly party unity. And, as we saw in 2016, the Democrats had just as many difficulties crafting a "unified party platform" (to quote Obi) at their national convention as the Republicans did.
I didn't say anything about Democratic voters being reactionary. I was talking about the formation of the party's messaging, as a way to indicate that the Democratic party is just as diffuse and just as much a coalition as the Republican one. As you point out, the Democrats embrace a neoliberal economic policy that's similar to the Republican party. Why is that? Because since Reagan, the Republican party has set the terms of the debate. The massive federal programs and high taxes from the heyday of the Democratic Party from FDR to LBJ are over, and Democrats now know that their party was once was based on such a platform, and they sometimes gesture towards it as a golden age, but the Reagan revolution has made it politically unfeasible.