There seem to be a lot of popular ideas out there that I think are born of xenophobes who are looking for ways to fight off the inevitability of the American Melting Pot really going to work...
Political correctness is one of them. It is a term which is motivated, perhaps, to counter a growing pressure that is seen especially in consumer-manufacturer relationships that are responding/enabling multi-cultural representation in their products and in their messaging. Those on the xenophobic side see these sorts of things as a threat to their comfort zone and label such dialog and the corrective measures asked for and granted, even the loss of jobs, etc... Political correctness is a non-term indicating the same old conflict across political perspective and how it excites conflict and emotion. New standards are coming and conservatives are partially resenting those new standards. Social media is increasing the visibility and response times for such standard implementations.
White nationalism or pride...another cover idea so that people can express their whiteness in terms that minorities have done in a politically active way to counter their xenophobic fears of diminishing dominance. White Europeans to a large extent left Europe because of national and political conflicts and coming to America was to attain a freedom from that. Of course, over the generations, that context has been forgotten. Some specific European communities have maintained cultural ties and celebrations from their past (I think of the various Scandinavian festivals that occur in towns in my state). These were never about politics, just about celebrating their national and cultural heritage. If white people have a culture to distinguish from others in America it is in their European national roots not in their American ones. Europeans in America have so intermixed as to have formed the basis for a new national identity but as the dominant identity there is no cause for political conflict...until now where the perception is that domination in numbers is about to end (vs all minorities). So it is entirely disingenuous for whites to form up in defensive political identity due to any sort of perceived persecution...anyone who graduated high school knows enough history to see that as a total joke.
Border security and voter fraud are two additional political complaints with no basis outside of xenophobia.
Now what all these things have in common is that they are clever mal-appropriations of ideas that are in themselves based on something valid but are mere copies of ideas that originally grew out of a lot of suffering and pain experienced in a more than just personal way by certain groups of people. White people, who never had to fight for the right to vote, to sit where they like in a business establishment, to not get attacked by people in pointy-headed ghost costumes, to being literally slaves, to being removed from their rightful homes and placed in internment camps, etc...are now, somehow still just as much a victimized group.
The great irony, of course, is that it was their ancestors who were the ones who perpetrated all of these acts. I guess many xenophobic white people are becoming literally afraid of their own shadow.
The other great irony is that all of these "others" the xenophobes are so concerned about are all here either because they were forced to be or they were inspired to be just as our own white European ancestors were.
Without a knowledge of history, people are doomed to repeat history. Political correctness is a natural outgrowth of the principles laid out in the Constitution of the United States since day one...now we are just enacting those same principles on a global scale...the American dream is not White! It is human.