from the wiki for US based freedom of speech
Freedom of speech, also called free speech, means the free and public expression of opinions without censorship, interference and restraint by the government. The term "freedom of speech" embedded in the First Amendment encompasses the decision what to say as well as what not to say.
[con't] under the wiki for the limitations of free speech:
Freedom of speech is not an absolute right, and legal systems generally set limits on the freedom of speech, particularly when freedom of speech conflicts with other rights and freedoms.
for the OP, sometimes it's best to consider stepping back and letting angry dumbass responses (not to be confused with honest and direct responses) run their course before stepping back into it. you may find someone defending and arguing for you by the time you return or finding that you may have gained a new insight or view. it doesn't mean you have to give up, if you believe in something strongly, make the argument with sound logic instead of emotional reactions. warnings aren't issued for logical arguments.
even when it may appear you might have "lost" an argument, remember the statements you make may have persuaded others to your view.