Settler extremists on Facebook

Here’s a good report on the settler extremists’ extensive presence on Facebook.
It includes things like this:

    The Givot Olam outpost, east of Nablus, also opened a Facebook group. They posted a picture from a wedding where two young men are seen dancing with M-16 rifles. Right-wing activists Baruch Marzel and Itamar Ben Gvir of Hebron also have Facebook profiles, where they share their opinions on current events.
    Bentzi Gopstein, who is a member of the Kiryat Arba Regional Council, operates the Facebook group “The Jewish idea – Rabbi Kahane’s philosophy.”
    “We disseminate the ideology of Rabbi [Meir] Kahane,” he explains. “I started it about six to eight weeks ago, and we have about 600 members. We put up a ‘Daily Kahane’ – a statement by the rabbi every day on the situation…

How much of this publishing activity is legal under Israeli law, I wonder?