@blatham,
As you know, I have long said that the Dems (over and beyond Warren and Sanders) need to keep it civil and focus their hardest critiques on Trump. But I now also see that the devil is in the details: What constitutes a "vile attack", and what is just civil disagreement? Where does one draw the line? Because there
ought to be disagreements and debates during the primaries, otherwise the discussion becomes insipid and useless, and some of these perfectly honest disagreements and debates could very well be misconstrued or misrepresnted as "vile attacks"...
There's no simple answer of course. Some of these "that is vile - no it is not" exchanges will just have to happen, and we'll all have to agree to disagree about whether any particular offense reaches the "vile" level.