0104 GMT December 12, 2019
Ebenezer Azamati, a postgraduate student, was taken from the venue by a security guard when he tried to return to his seat before the debate last month, PA Media reported.
Brendan McGrath, the president of the union, a debating society that operates independent of the university, wrote in a statement posted to Facebook late on Tuesday that he had resigned because it was his “job to ensure that every member feels welcome at the Oxford Union.”
“For all of my shortcomings, and all of my mistakes, I apologise profusely and unqualifiedly,” he added.
Azamati, an international relations scholar from Ghana, said his treatment left him feeling “unwelcome in the union, Oxford and even the country.”
He successfully appealed on Saturday against what he said were claims of “false violent disorder” by the union.
The society has hosted speakers and debates since 1823.