Putting aside I was born in England, and both my parents were - these are my biological, maternal grandparents on their wedding day not long after the end of the war in the 1950s But the white nationalist would say I’m not English, because I have more melanin than them It’s just racism
Best way to find out if someone is being a white nationalist as opposed to genuinely interested in identity is whether they see mixed race people with a white English parent as ethnically English If they can’t give you a straight answer of “well obviously” then it’s about melanin, nothing else