There's no such thing as a unified white race, there's only aryan europeans.

There's nordic europeans, the original britons, mixed anglo saxons, croatians, hungarians, poles, italians, etc etc.

Whether you want to consider them mixed or not is your choice if you only think nordics with blonde hair, the palest skin and blue eyes are "white".

This man is just as european as any other european. His genes have been here for centuries. He's not mixed at all, yet someone will call him swarthy or non european.