I do hear you, though being a physician I don't know many colleagues who are democrats -  or relatively few.
I believe many are largely talking about the far Left progressives, whose ideology has been quite clear - spelled out in Prof. George Lakoff's progressive bible - so to speak.  (he's the one they all regurgitate - the fellow who coined the "you didn't build that" mantra).

They are, for the most part, referring to those who wish to 'transform' our country into a quasi-socialistic nation & propagating the notion that their base are the victims of an unjust society   ....and we're here to help - by force, coercion, property confiscation, redistribution, and the resultant loss of individual freedom - with nearly every aspect of your life regulated.  They'd regulate free speech if they could & have devised innovative ways to shut-down dissent. 

I don't view democrats as THE problem, but the far Left is not just a problem, they are a danger.  And dems seem headed in that direction.