> what is the psychological label for people who do not distinguish artist from art?
There isn't one because you can dislike a person and/or their works for literally any reason you want.
Is there a label for insisting that people put aside their feelings and engage with something because you have deemed their reason for not doing so invalid?
‘Shoulding’?
while I agree that an artist can not be separated from his art (forget Poe, see Vrubel), there is also a label for people that put their faintest feelings above everyone else, and that label is: a despised snowflake.
I said nothing about like or dislike.
I only implied that implied psychological traits of a fictional character are not evidence of the same psychological traits in the author. It's merely evidence that the author is capable of observing or imagining such traits in others.