I'm with you on the boycott thing not being 1st amendment related, however, I do have a problem (maybe constitutional, still not sure) with the whole thing being led by the slime at Media Matters, which somehow, last I checked, is some kind of "non-profit" entity that pays no taxes.
Nope not even close and if such is so then the Dixie Chicks have cause for A First Amendment case and trust me if such was so there would have been liberal lawyers crawling all over that one.
The First Amendment does not cover livelihood or talking on the radio it covers speech as well as freedom of religion and freedom of the press redress of grievances and the right to assembly.
So such is not a First Amendment issue and saying such just weakens the Conservative Movement and empowers the Left.
Stick to "what IS' and not to "what you WISH"...