I noted that it is very possible that the dead were killed by other Arabs, or the British. As was pointed out in the comments, the British bulldozed many houses in Jaffa itself during the Arab revolt.
I ended off by saying:
We can expect that the Al Aqsa Foundation will continue to claim that the apparent Arab victims purportedly discovered in Jaffa could only have been killed by Jews. History shows that this is far from obvious, and when this story gets into the more mainstream media, lets hope that the reporters are smart enough not to swallow the lies from an organization that routinely lies to further its agenda.Sure enough, the media swallowed the Al Aqsa Foundation's unsupported claims. From The Daily Mail:
It is possible that these were victims of Zionist forces, of course - but it is irresponsible to report it as undisputed fact without any evidence.
(AFP quotes an Arab as saying that he buried people killed in Jaffa over a number of months in the cemetery. It is possible, as people are killed during a war, but this is not a "massacre" as the Al aqsa Foundation claims.)