Original sentence: His career was further overclouded by the long-drawn-out Dreyfus case, in which he took an active part as a supporter of Emile Zola and an opponent of the anti-Semitic and Nationalist campaigns
Edited sentence: His career was further overclouded by the long-drawn-out Dreyfus case, in which he took an active and honourable part as a supporter of Emile Zola and an opponent of the anti-Semitic and Nationalist campaigns