> Apart from Israel/Palestine what speech is being silenced?

You say that as if people posting about Israel/Palestine isn't political speech that matters. Free speech matters and you shouldn't have police coming after you for it even you're just a teenager posting lyrics to facebook (Chelsea Russell) drawing a penis on a photo of a cop (Jordan Barrack), sharing a vacation photo of yourself holding a gun (Jon Richelieu-Booth), repeating gossip surrounding recent events (Bonnie Spofforth), talking shit about your boss (Robert Moss), or saying that a politician should resign (Helen Jones).

While that kind of speech can be silly, thoughtless, rude, or annoying it's also normal everyday speech that happens everywhere. Just because technology allows police monitor our speech more closely than they could before that's no reason for using that to go after people for the kinds of expression that have been a normal part of life for ages.