I’m going directly by how the workshop description defines it:

>Whiteness and white racialized identity refer to the way that white people, their customs, culture, beliefs operate as the standard by which all other groups are compared. Whiteness is at the core of understanding race in America. Whiteness and the normalization of white racial identity throughout America’s history have created a culture where nonwhite persons are seen as inferior or abnormal.

Anyone that has ever made the argument that poor Irish and Italian immigrants weren’t considered white when they immigrated to this country en masse at the end of the 19th century logically believes how this woman defined “Whiteness.” This isn’t a racist definition.