Jeremy Corbyn leads a pro-Palestinian demonstration in London in 2014, one year before becoming Labour Party leader. Photo: File.

The British Labour party has been hit with yet another antisemitism scandal, with calls to fire a “key aide” of leader Jeremy Corbyn for newly-revealed virulent anti-Israel statements.

Joss MacDonald, a speechwriter for the party, reportedly went on an “online tirade” in 2014 in which he called Israel an “apartheid state” that is treated leniently “because of the Holocaust,” the UK’s Jewish Chronicle reported on Sunday.

According to the report, he also accused Israel of committing “genocide.”

Four years earlier, MacDonald went on a similar rant, lambasting Israel for “killing the two state solution.”

Euan Philipps, spokesperson for the group Labour Against Antisemitism, issued a furious condemnation of MacDonald, saying in a statement to The Algemeiner that MacDonald’s “reported comments are abhorrent, deeply offensive, and extremely ignorant. They offer further evidence of the way antisemitism is becoming institutionalized at all levels of the Labour party.”

He also pointed the finger directly at Corbyn, stating, “In December Jeremy Corbyn promised a meeting of Jewish Labour party members that there was ‘zero tolerance’ of antisemitism within the Labour party. Now Mr. Corbyn must make good on that promise and carry out a full and transparent investigation. If it is found that the reports are true then Mr. MacDonald must be removed from his post and the Labour party. There can be no place for anyone with these views in the Labour party.”

The MacDonald affair is only the latest in a long line of antisemitism scandals that have struck the party since the intensely anti-Israel Corbyn took over leadership several years ago.

The most prominent scandal involved former mayor of London Ken Livingstone, who was suspended after he falsely claimed that Hitler “supported Zionism before he went mad and ended up killing six million Jews.”

Last week, the Labour party extended Livingstone’s suspension from the party, but refused to meet activists’ demands that he be permanently expelled.

Earlier this year, Labour was forced to expel one of its most prominent activists, Tony Greenstein, for repeatedly using the white supremacist slur “Zios” to refer to Jews and Israel supporters.

Greenstein had previously stated that “Zionism is a Jewish variant of anti-Semitism. … Zionist attacks on people who are not anti-Jewish have one effect, to legitimise anti-Semitism.”

He has also advocated the extermination of Israel, saying, “Yes, I want the state of Israel to be destroyed.”

Another prominent Labour figure, Jackie Walker, faced sanctions after she called Jews the “chief financiers of the slave trade.”

Walker later wrote a play claiming she had been “lynched” by her critics and was only criticizing Israeli policies.

As The Algemeiner reported at the time, Walker was allowed to rejoin Labour, but a video then emerged in which she denied that she could “work with” any definition of antisemitism, questioned why Jewish schools should have more security, and said Holocaust Memorial Day should commemorate other genocides beside the Holocaust.

In fact, Britain’s Holocaust Memorial Day already does so.