Complex sentence: It was in this role that, in September 1948, Eldad participated in ordering the assassination of Folke Bernadotte, a United Nations mediator, as he subsequently admitted.
Split into simpler sentences: It was in this role where Eldad condoned the assassination of Folke Bernadotte, a UN mediator. In September 1948, Eldad was one of those who ordered the assassination of the United Nations mediator Folke Bernadotte, as he subsequently admitted.