My thesis focuses on the phenomenon of cancel culture hidden behind social activism through J.K. Rowling's cancellation case. This paper delves into the complexities of cancel culture as a mechanism of silencing dissent and enforcing conformity, particularly evident in the treatment of outspoken ’radical’ feminists like Rowling. Drawing on feminist literature and gender studies, it scrutinizes the intersection of cancel culture, social media activism, and the post-truth era, revealing the ways in which emotional reactions often supersede factual truths. Through a meticulous analysis of Rowling's case and related digital activism of the US and UK, this study unveils the aggressive tactics of radical transactivism and its impact on feminism. It underscores the blurred lines between transphobia and feminist advocacy, questioning whether concerns for women's rights are inherently transphobic.