Freedom of speech (2)

Freedom of speech is a complex and controversial issue that needs to be debated rationally. Should it be legal for Arabs in Israel to argue against the Jewish nature of the constitution and advocate a bilingual and multicultural state in which citizenship would no longer be granted automatically to any Jew and in which Arabs in the state would have equal rights with Jews? I think it should as argued in this article by a teacher of politics at Ben-Gurion University of the Negev in Israel.
Israel has been a great success as a nation state, creating a dynamic economy and a vibrant democracy with a free media. It is not the apartheid state that some of its critics charge. But equally too it does not treat its Jewish and Arab citizens equally and the religious nature of the state ought to be a matter that can be freely debated in the country.