File: "Survey_data_pilotstudy" contains responses from participants (N = 198) regarding political and organisational efficacy, legitimacy, stereotypic competence, support intentions, and social identification in the context of an undisrupted mobilisation of a bogus radical-right movement. File: "Survey_data_exp1" contains responses from participants (N = 429) regarding organisational efficacy, legitimacy, stereotypic competence, support intentions and social identification in the context of the same movement but here participants were assigned to one out of three experimental conditions (control = undisrupted mobilisation; experimental condition 1 = disrupted mobilisation; experimental condition 2 = disrupted mobilisation due to mockery). File: "Survey_data_exp2" contains responses from participants (N = 360) regarding the same variables as in experiment 1 but in the context of a mobilisation of an identity-neutral movement. The experimenal conditions were the same as in experiment 1.