Shomrim, the Charedi volunteer security group, also claimed the men used worse antisemitic language.
Metropolitan Police officers attended the scene on Saturday but no one was arrested.
The "preachers" appear to be from the Israelite Church of God in Jesus Christ – or a similar group – with roots in the American Black Hebrew Israelite movement.
The ‘church’, formerly known as the Israeli Church of Universal Practical Knowledge, has previously been designated a hate group by the Southern Poverty Law Center in the United States.
It teaches that the true biblical Jews are the African Americans, West Indians, and Native Americans of North and South America – rather than those widely considered to be the Jewish people.
Philip Glanville, the mayor of Hackney, assured local residents that council officers had made themselves available to police to “assist where they can, including surveying local CCTV”.
