[claudiawerner]

It is only superficially the same argument, which is to say, if you ignore the qualitative content of the two matters; the fact that they both reduce to opinion is irrelevant, since society is built upon general consensus on particular opinions rather than general principles everywhere. Just as not every action is alike (and we prohibit the expression of some actions), not all speech is alike (and, just as with action, we may decide to prohibit its expression).