From Wikipedia:

Noel Ignatiev (/ɪɡˈnætiɛv/, born Noel Saul Ignatin; December 27, 1940 – November 9, 2019) was an American author and historian. He was best known for his theories on race and for his call to abolish "whiteness". Ignatiev was the co-founder of the New Abolitionist Society and co-editor of the journal Race Traitor, which promoted the idea that "treason to whiteness is loyalty to humanity".[3] In 1995 he published the book, How the Irish Became White, an examination of the choices made by early Irish Immigrants to the United States, many of whom, when faced with xenophobia and a history of being oppressed themselves, proceeded to take the opportunity to increase their power in society by identifying as "white" and participating in oppressing darker-skinned peoples.[4]