In February 2019, Oberman and
Rachel Riley instructed a lawyer to take action against 70 individuals for tweets which they perceived to be either libellous or tantamount to harassment, related to their campaign against allegations of
antisemitism in the Labour party.
[51] As a result, Riley and Oberman sued one person who had retweeted a link to an article which had accused Oberman and Riley of harassing a young Labour activist who had commented on accusations of antisemitism in the Labour Party. In May 2019, a High Court judge ruled that the article that was linked in the tweet was defamatory. In July 2020, Riley and Oberman dropped their joint libel suit and contributed towards the defendant's legal costs.
[52][53]
....
On 4 April 2021, Oberman falsely accused politician and academic
Philip Proudfoot of antisemitism,
[56] claiming he had a
Twitter "Jew Blocklist".
[57] On 26 April 2022, she issued a statement apologising for her inaccurate and "hurtful comments", noting that she would pay "substantial damages" to Proudfoot along with his legal costs.
[58][59][60]