Democrats are against outright hostility and blatant marginalization of certain classes.
But both have largely been ok with everyone being exploited by feudal trade economics, bombing other nations to satisfy global political norms, and swindling developing nations out of their resources, while emotionally coddling elites.
It means something to not be outright hostile to the truly marginalized, but the Dems have not exactly been labors friend. And most people are laborers. They’ve failed the majority plenty.