As a lifelong democrat, I find this to be very dangerous rhetoric. It sounds tonedeaf. Regardless of the candidate, being critical of politicians is a cornerstone of democracy.
I understand it's important to be a united front, but the need to seemingly bring dissenting voices into line is not a good way to do it. We cannot force people to say we have a perfect candidate for the sake of avoiding discussion.
Edit: a word
My sentiments exactly. The enemy of my enemy is my friend, as annoying as they can be. Now that I'm not using reddit I wish them the best of luck wreaking havoc.