Где это они на такое ссылаются?
Такого закона, насколько я понимаю, просто нет,
соответственно ссылаться на него нельзя.

http://en.wikipedia.org/wiki/Freedom_of_speech_(international)

For instance, a U.S. newspaper may freely express opinions
which in other places might be criminalized as "hate
speech", and organizations dedicated to such speech may
freely march and speak in public (after having complied
with all relevant content-neutral regulations). For these
reasons, the Web services of most neo-nazis organizations,
and most Holocaust deniers, etc. are hosted in the United
States.

Within the U.S., the freedom of speech also varies widely
from one state to the next. Of all states, the state of
California permits its citizens the broadest possible
range of free speech under the state constitution (whose
declaration of rights includes a strong affirmative right
to free speech in addition to a negative right paralleling
the federal prohibition on laws that abridge the freedom
of speech). Thanks to the Pruneyard case, California
residents are even allowed to engage in free speech on
other persons' private property.

Иначе говоря, по калифорнийским законам
я могу упражняться в hate speech даже на чужой
частной собственности, и если они хотят
помешать мне в этом, их можно в теории
засудить нахуй.

Такие дела
Миша