There is no proof, only accusation.
Edit: The article also does not prove that Facebook unblocked them (as no block was proved), nor reached out to Facebook on if they did indeed respond saying it was accidental.
Facebook replied on Saturday with an apology, saying the suspension had been "accidental".
That means it happened - Al Jazeera is one of the more reliable networks according to my journalist friends, and aren't usually known to publish something without fact checking or couching it in 'unconfirmed'.
Facebook also has not published any PR statement apologizing for this, so either they are not real news agencies to begin with, or this never happened, or both.
Al Jazeera is reliable except when it comes to issues like this, they suffer from a bias from having this done to them in the past as well.
>Editors from two Palestinian news publications based in the occupied West Bank say their Facebook accounts were suspended last week and that no reason was provided, alleging their pages may have been censored because of a recent agreement between the US social media giant and the Israeli government aimed at tackling "incitement".
Rubbish journalism: no actual causal connection between the Israeli government, Facebook, and the pages being taken down has been established. It's merely assumed to be there because al-Jazeera and its readership are predisposed to believe the nefarious tentacles of the Israeli government can reach anywhere.