Are you joking?
Explain to me the difference, if any, between Palmer 'retaliating' against Clinton, and Insomniac 'retaliating' against Palmer.
ANY claim Palmer can make to 'free speech' must also extend to Insomniac. Any claim Palmer makes against Insomniac must also apply against Palmer. Either both Palmer and Insomniac have the choice of who to associate with, who to engage in commerce with, and to attempt to sway others to similar thinking, or either of them can.