Elo, I think we all know that we don't have absolute free speech e.g. paedophile literature is rightly banned, so all things can never be equally considered for publication.
It's not a case of "anything goes".
Your mention of Dixie Chicks, theatres, etc only confirms that we should avoid giving in to those who are easily offended and wish to impose their beliefs on the rest of us.
You don't have to publish crude, pornographic, and provocative cartoons to upset the fundamentalists - a simple drawing of Mohammed offends; as does schoolgirls' hair, scantily-clad women, etc. In Israel, fundamentalist Jews caused a lot of violence and mayhem attacking advertising billboards and building roadblocks to prevent public transport on the sabbath. The majority of citizens in that country live a secular lifestyle.
Extremists want to impose their faith, as they see it, on the rest of us. I think we must resist.