Diversity, Equity, and Inclusion (DEI) ideology has spread through schools, universities, corporations, and government agencies, destroying excellence, integrity, and comity. Now, a new investigation shows that DEI has infected one of the most sensitive and important fields in America: mental healthcare. These therapies were developed to help patients overcome serious mental health challenges. DBT was originally designed to help patients suffering from Borderline Personality Disorder and other severe emotional difficulties, while CBT has become one of the most effective treatments for anxiety and depression. Mental health professionals should not be repurposing clinical treatment tools into instruments of political and ideological advocacy.