Yup, I did assume it was that type of critique, my bad. I do not have an answer that would be satisfing however:

- While I like Senator Sanders, reasonable people (I would like to believe I am one) can have stuff to dislike about his policies. This is how I view the non "alt right" complaints about him.

- Being more to the center than someone else, does not make you a mouthpiece for the centrist party.

Edit: I misread your comment again. I deleted an unrelated response.