Two studies tested the idea that perceived normalization of radical political ideologies (right and left) reduces support for freedom of speech of the opponents and political tolerance. In Study 1 (N = 633), Americans were primed with the normalization of the radical right or left. Primed with the normalization of radical outgroup ideologies, both liberals and conservatives were more willing to restrict their opponents’ freedom of speech and were more politically intolerant – effects that were mediated by collective angst. Study 2 (N = 632) replicated the results of Study 1 and extended them by showing that both conservatives and liberals worried about the image of their party not when they were exposed to the normalization of radical ingroup ideologies, but when they were exposed to the normalization of radical outgroup ideologies. These results suggest that perceived normalization of radical ideologies affects people’s attitudes towards freedom of speech and political (in)tolerance.