In 1982 Blocher founded the «Arbeitsgruppe südliches Afrika» (ASA), where he was president. It published the ASA-Bulletin. In it the South African regime was defended by military, political and business leaders. It also gave supported to the racist policies of the regime. It also criticized the decolonization of Africa and advocated a recolonization of Africa. Blocher fought against voting rights for blacks which he also said to the Swiss journal Schweizer Illustrierten. Blocher was also deeply involved in sales of military equipment to South Africa via Ems-Patvag, part of his Ems Chemie Holding.
Switzerland has still not reviewed its historical political, military and business relations with the Apartheid regime, due to pressure by powerful politicians.