Does the animosity toward a holder of an opposite political opinion or the behavior toward someone whose opinion on a divisive issue is unknown depends on whether that opinion was disclosed or withheld voluntarily? In order to study this question, we conducted a pre-registered study in Russia, measuring the pro-war dictators’ behavior towards their partners with aligned or conflicting views on the war in Ukraine using give-or-take modification of Dictator Game. In the presence of a large polarisation gap (outgroup discrimination), we did not find that intentional vs. unintentional disclosure of the recipients’ positions affected the transfers of the dictators; at the same time, dictators’ beliefs about the share of war supporters among experiment participants and the donations made by other dictators were causally affected. Our study is the first one to consider this dimension of social interactions, and contributes to the quickly growing literature on political polarisation.