"The Ashkenazi Jewish (AJ) population has long been viewed as a genetic isolate, kept separate from its European neighbors by religious and cultural practices of endogamy (1). [...] Y-chromosome studies also indicate only a low amount of admixture with neighboring Europeans (8-10). [...] Consistent with recent reports (13, 20, 23-25), principal component analysis (PCA) using these combined datasets confirmed that the AJ individuals cluster distinctly from Europeans...

Right there in the third paragraph. And futhere down we have:

However, these and successor studies of monoallelic Y chromosomal and mitochondrial genetic markers did not resolve the issues of within and between-group Jewish genetic identity. Here, genome-wide analysis of seven Jewish groups (Iranian, Iraqi, Syrian, Italian, Turkish, Greek, and Ashkenazi) and comparison with non-Jewish groups demonstrated distinctive Jewish population clusters, each with shared Middle Eastern ancestry, proximity to contemporary Middle Eastern populations...

And then the best:

Dr. Hammer said the finding accorded with the hypothesis that Roman Jews were the ancestors of the Ashkenazis. Despite the Ashkenazi Jews' long residence in Europe, their Y signature has remained distinct from that of non-Jewish Europeans."

Of course there is one of the other papers i linked:

"North African Jewish and non-Jewish populations form distinctive, orthogonal clusters."

So keep on linking that site.

Wahrheit macht frei.