There really isnt a such thing as "white culture" in the definition that people use it today. Europeans in America are a very diverse group. But what groups do you think tries the hardest to fit into the fictional "white culture"..

Hispanics:
You have those who call themselves "Hispanic" connecting their history to Spainards (i.e. whites). Those you call themselves Latino connecting themselves to the Romans (i.e. white).

Asians:
You have Asians who go as far as having eye surgery to take the slant out thier eyes. Give themselves names like Matthew, Mark, Luke, or John..(never mind its the last name we all look at)..

Africans:
Then there are Africans, refuse to wear thier traditional robes, but where things like jeans, slackes, and tennis shoes..Because thier black thyre at a disadvantage. The only hope is that they have mixed raced childern to breed the black out of themselves..