The BSI was pointedly hostile to the Zimmerwald Conference. At a speech to the congress of the Dutch party Huysmans ridiculed the Zimmerwaldians for their impatience, as well as for the unrepresentative and "amateur" nature of the conference. Huysmans later reportedly made special trips to Britain and France to dissuade socialists in those countries from attending the Kienthal Conference.
The BSI was opposed to the Zimmerwald Conference. At a speech at the Dutch party congress, Huysmans criticized the impatience of the Zimmerwaldians and their unrepresentative nature as "amateurish." Later, Huysmans reportedly traveled to Britain and France to discourage socialists from attending the Kienthal Conference.