He was so racist Amnesty International stripped him of his "Prisoner of Conscience" status; specifically for speaking at and attending Russian Neo-Nazi rallies and for his ads which have compared Muslims and Caucus immigrant to bugs to be shot at and a dentist ad I can't really find but I remember being racist ¯\(ツ)/¯
People try and pretend like he's some noble freedom fighter when he really just wants to use the Russian state apparatus to make himself rich and kill some Muslims as a bonus
Popular liberal opposition to Putin with far right talking points. He survived an attempt to poison him (allegedly by Russia) only to return there, be arrested, and now he died in a Siberian prison