In June 2020, Black Lives Matter UK (BLM-UK) posted a series of tweets in which they endorsed the pro-Palestinian Boycott, Divestment and Sanctions movement. Calling for 'targeted sanctions in line with international law against Israel's colonial, apartheid regime,' one tweet claimed that 'mainstream British politics is gagged of the right to critique Zionism'. The tweets were seen by some to be antisemitic and resulted in the English Premier League, the BBC and Sky Sports, which had hitherto been supportive of the Black Lives Matter protests, distance themselves from the Black Lives Matter movement. One month later, during the BLM protests in the USA, Black NFL player DeSean Jackson posted material to his Instagram story that was also viewed as antisemitic. This article unpacks, via these two sports-based incidents, the relationship between anti-racism, antisemitism, and anti-Zionism. I discuss how these tensions are not new, but a clear echo of the tensions that existed in the 1960s and 1970s during the height of the Civil Rights Movement; these tensions continue because the foundational issues remain unchanged. These two incidents raise important questions about how sports organisations operate in a world where sport is seen as 'apolitical' and strive for 'neutrality' but fail to recognise sport is political and that a position of neutrality cannot be successfully achieved. The article assesses the challenges that arise when sports organisations, and their athletes, choose to engage in a certain kind of sport politics.