it doesn't say the immigrants are to blame, it just strongly implies that this could be a likely reason, furthermore for some reason to be an immigrant is to not be white which certainly was not the case when I immigrated to America.
American immigrants are no longer white, overwhelmingly.
That doesn't make this argument credible. Is there any credible source?
> rather than that they’re blaming immigrants, which I didn’t see in this post
We know well that the talking points of racism are formed to create ambiguity and use dog whistles. That goes back half a century and probably much longer. These are the talking points.
If, for example, they degraded, then it would indicate there is a problem happening that even the higher socioeconomic status doesn't protect from despite all its benefits (well it might protect relatively better that other SES, but not enough to prevent the downward trend).
If, instead, they improved relative to their past selves, it would indicate the problem causing the overall trend is found entirely within other SES groups (well not entirely, as it is possible the impact still hit this group but that other factors more than made up for it, but to keep it simple, we can ignore such a possibility unless we see even better data that can parse out these more complex relationships).
* Yours is that the bottom 10% are declining. That says nothing about who is in the bottom 10%.
* The GP says the composition of the population has changed, and blames immigrants.