That's interesting, I didn't know that. Sounds reasonable to me.
The US first ammendment ("free speech") protects citizens from reprecussions from the government if a citizen criticizes the government. That's it. It doesn't mean you can say whatever tf you want, as some people interpret it. In fact, in the US, some people who misinterperet the first ammendment will be summarily executed by someone who misunderstands the second ammendment!