A concise, research-informed account of how visual jokes and viral graphics become vehicles for prejudice and political persuasion, outlining the cultural, rhetorical, and technical mechanisms by which memes spread hate and evade moderation. It offers a taxonomy of hateful meme strategies, methodological tools for analyzing and detecting them, and case studies showing their evolution and impact, while addressing ethical, legal, and platform-responsibility questions and proposing practical responses such as counter-speech, design changes, and community resilience measures.