Why would anybody expect US Democrats to be in tune with the Republican voter base?
I'm in tune with the Republican voter base and I'm a moderate Democrat. It's easy to understand the RW base. Their politicians and think tanks understand the Republican voter base to a good amount.
Psychological analysis, trigger words, tones, optics, everything. The RW elitists have spent money on understanding everything about the conservative culture.
From what foods they like to narratives that trigger emotional reactions.
When you see a Frank Luntz 'Focus Group' on Fox, he's there probing the audience for trigger words. Testing them to see what they react to.
That information is used to create RW talking points with the researched trigger words/narratives implemented.