Original sentence: Wyatt Kaldenberg (born 1957 in California, USA) is an American Odinist (a type of Germanic neopaganism), author of several books, and former White Supremacist and advocate for Tom Metzger's White Aryan Resistance (WAR) organization
Edited sentence: Wyatt Kaldenberg (born 1957 in California, USA) is an American Odinist (a type of Germanic neopaganism), author of several books, and former leading White Supremacist and advocate for Tom Metzger's White Aryan Resistance (WAR) organization