Western nations have not had their racial homogeneity and other uniting forces destroyed for positive reasons, you submoron. It's been done to make them willing golems to attack the rest of humanity.
What about the United States? Y'know, the one major Western nation that was not founded on a specific ethnic identity?
Even if the majority of the Founding Fathers were of English stock, they didn't want to create the United States along only one particular ethnic or religious identity. While the majority of the people in the Thirteen Colonies were Protestants of English stock, it was not enough of a majority to be considered homogeneous. Keep in mind that several of the British colonies in North America were not founded by the British. New York and northern New Jersey were originally Dutch colonies and Sweden had colonies in Delaware, southern New Jersey, and parts of Pennsylvania that were taken by the Dutch before being taken by the British in the late 1660's.
While most of these inhabitants were Northern Europeans, not all Northern European peoples were considered "White" in the 18th and 19th Centuries (just ask the Irish and the Ulster Scots) and you even had small Jewish communities in the southern colonies.
You couldn't even build America along a single religious identity, as most of the British colonies north of the Potomac were either captured from the Dutch or were designed as the demographic equivalent of containment boards for any religion that was at odds with the British Crown and the Church of England.
Maryland was founded by Roman Catholics and was named after the Virgin Mary and Massachusetts was founded by the Puritans and was ran as a de facto theocracy where even Christmas was too "degenerate" and could get you lynched
There were too many ethnic and religious identities in the Thirteen Colonies to create the United States along the lines of a state for a single "founding stock" and so the United States was founded along an identity based on Enlightenment ideals, most notably individual liberty and liberal representative democracy.
That's a major reason why most of these immigrant groups eventually adapted American culture. We saw it with all the "European Ethnics" (who are now White) and the East Asians. We even see it with Latinos who came here legally or who have been living in the United States for multiple generations.
The one ethnic group that hasn't really worked well within American culture are the Blacks, and that's because they did not choose to come over here. The first African slaves came to the English Colonies in 1619. By your logic, the blacks are "founding stock Americans" and while it is cringe-inducing to hear constant leftist whining about "structural racism" and "muh systemic oppression", they did suffer under systemic oppression in the past.
Even though Critical Race Theory can kiss my ass, we can't ignore slavery and segregation did historically exist and it did play a major role in the dysfunction of the urban black community, although LBJ's haphazard expansion of the welfare state also played a part in it as well, especially for the more recent generations of the black community.
Also, I've got to ask you a couple of serious questions...
1. If the Jews want to destroy America/The West, then what is their motive? What do they gain from destroying Western society?
2. Why do you cling so hard to reactionary puritanism? A lot of the things you consider to be "degenerate" are only seen as such because they were first outlawed and condemned by the Jewish laws found in Leviticus and Deuteronomy and some of those Jewish bylaws were also adopted by Christianity and Islam. For someone who is so opposed to the Tribe of Judah, you sure love to cling to the (((traditionals and morals)))