"I am a supporter of free speech" is fine in itself and up to a limit. In this context it is a cop-out and you become complicit in the harm Folau's views can do (and probably are doing/already have done). To quote poorfour from the other thread:
Not all rights are equal. Your right not to be offended, or to say whatever you want is less important than someone else's right to freedom from harassment and discrimination. When two people's rights come into conflict, humane societies determine precedence by looking at which option causes the least overall harm.