The Ds, which are just "the least Conservative of our two parties." Are not really DOING anything.
The fundamental problem with our current two party system is that DEI is difficult. Dems -are- diverse and inclusive. Which means a lot of competing special interests and priorities, many of which require compromise to advance. And nobody wants to give up their progress in order for someone else to get some.
The other party isn't trying to please multiple groups of people... it's trying to please one person. And the more stupid, inconsistent/capricious, demanding that person is, the more they struggle to give him the loyalty and power to get what he demands, because he doesn't care about the issues, he cares about the power. He tells them what he wants, and because it's him, they're immediately on board with it, even if tomorrow it's a complete 180, again.
This radical anti-DEI push is strategic. By alienating anyone who might have a different set of ideals, different background, special consideration, a systematic history of being treated unfairly due to immutable characteristics, etc... that's all too much focus on the cogs, and it distracts from the solidarity of pleasing the 'Great Leader'. So they're driving them across the aisle, knowing that more diversity will just make the democratic platform even more diverse / decentralized and ineffective.
The authoritarian/hierarchy party will continue to shed outliers. It's a self-policing motivational tool. Knowing that at any point they may be the next 'diversity' to be cast out, they work harder to earn their place and constantly keep an eye out for someone else they can throw under the bus in their place. (not rich enough, not connected enough, not attractive enough or not under the protection of someone high enough). They're too busy trying to hang onto their place in the hierarchy to worry about the ethics/morality/wisdom of the things they're being told to believe/pursue for the leadership.
At some point they'll shed too many people, who will be bitter and vengeful for being cast out... some will never switch parties, others will recognize that maybe they'd be better off in political ideology that's fundamentally built upon DEI in the first place. Either way, votes will shift.
The horrific question that remains is whether or not anyone will bother actually counting the votes when it happens.