As with many ideas that have served to undermine European identity, when traced to its roots, we find that its originator is a Jew filled with animus towards the civilisation that has given him the freedom, prosperity and physical safety he enjoys. In this case the Jew is named Noel Ignatiev, who popularised this notion of "fluid whiteness" in his book How the Irish Became White.
“Whiteness studies” is all the rage these days. My friends who teach U.S. history have told me that this perspective has “completely taken over” studies of American ethnic history. I can’t vouch for that, but I do know that I constantly see people assert, as a matter of “fact,” that Irish, Italian, Jewish and other “ethnic” white American were not considered to be “white” until sometime in the mid-to-late 20th century, vouching for the fact that this understanding of American history has spread widely.
The relevant scholarly literature seems to have started with Noel Ignatiev’s book “How the Irish Became White,” and taken off from there. But what the relevant authors mean by white is ahistorical. They are referring to a stylized, sociological or anthropological understanding of “whiteness,” which means either “fully socially accepted as the equals of Americans of Anglo-Saxon and Germanic stock,” or, in the more politicized version, “an accepted part of the dominant ruling class in the United States.” Those may be interesting sociological and anthropological angles to pursue, but it has nothing to do with whether the relevant groups were considered to be white.
Here are some objective tests as to whether a group was historically considered “white” in the United States: Were members of the group allowed to go to “whites-only” schools in the South, or otherwise partake of the advantages that accrued to whites under Jim Crow? Were they ever segregated in schools by law, anywhere in the United States, such that “whites” went to one school, and the group in question was relegated to another? When laws banned interracial marriage in many states (not just in the South), if a white Anglo-Saxon wanted to marry a member of the group, would that have been against the law? Some labor unions restricted their membership to whites. Did such unions exclude members of the group in question? Were members of the group ever entirely excluded from being able to immigrate to the United States, or face special bans or restrictions in becoming citizens?
If you use such objective tests, you find that Irish, Jews, Italians and other white ethnics were indeed considered white by law and by custom (as in the case of labor unions).Source
Ignatiev, the originator of this meme, has called for whiteness to be abolished and said that "treason to whiteness is loyalty to humanity". He even founded a magazine to expound this point of view called "Race Traitor".
To be a traitor, of course, you must be a member of a group in the first place. Ignatiev's title implies that he considers himself, a Jew, to be part of the "white race". His desire to abolish the white race can then be presented as noble and self-abnegating. But if Jews are of Middle Eastern origin, as the colonists of Israel assert, then they are not ethnically European. Their repeated intellectual attacks on the idea of European ancestral peoplehood could therefore be interpreted to represent not innocent altruism, but disguised ethnic warfare, motivated by a desire to disempower and destroy a competing ethnic group. This is the process that I call Jewhad.