In the world of PC, black people get to be "African-American"...red people get to be "Native-American"...yellow people get to be "Asian-American"...brown people get to be "Hispanic", etc. and white people are just...well..."white".
I don't agree. There is a specific identity for any American. It's being... welll.... "American"!
There are sub cultures. You can call it a "white" subculture or some other european subgroup.
People who are mixed ethnically are "american" first and "mixed-ethnicity" second. But, if someone is not mixed, does that really matter? I hope not!