That's humanity for you, right or wrong. If you can't take the heat, get out of the kitchen.
The idea that somehow the artist must be willing to take anything the audience chooses to dish out without comment or reaction seems hypocritical.
What is good for the goose is good for the gander, you know. We fans are putting our comments out there to the public, too. It is, if you will, our art. It, then, should also be open to critique, and he gets to say what he likes about it.
My thought is that if the public, the audience in aggregate, cannot keep itself to speaking in proportion, without showering the artists with hyperbolic vitriol, then the audience does not deserve to have good art made for it.
And you wonder why, maybe, we get so many crappy movies. Maybe it is because we're kinda crappy, ourselves. We get what we deserve, hm?