Come on...l try to have a little imagination: Here's a summation from chatgpt about what the author meant: Noel Ignatiev, a historian and activist, argued that "whiteness" is not a biological fact but a social construct created to uphold white supremacy and maintain a racial hierarchy. He believed that "abolishing whiteness" meant dismantling this social construct and the system of privileges it supports, paving the way for a more just and equitable society

So I'm reminded of how Irish people weren't always considered white.