Of course, Mongolians never made it to Finland or even Northern Russia (Kargopol area) where these Russian samples are from. How did this crap get through peer review?
The proportions of admixture from ancestral EUR and EAS [European and East Eurasian, respectively] were estimated, and are shown in Table 2. CEU populations mostly originating from France and Germany had a small fraction (0.7 +/- 0.8%) of genetic material from EAS. People from Great Britain such as British (GBR) and Orcadian inherited 2.5%–3.8% from ancestral EAS. Finnish (FIN) and Russians inherited significantly more genetic material (>12%) from ancestral EAS, which is consistent with their historical record of admixture with Mongolian populations. Besides, Adygei from Caucasus inherited 3.2 +/- 1.0% from ancestral EAS.
Pengfei Qin et al., Quantitating and Dating Recent Gene Flow between European and East Asian Populations, Scientific Reports 5, 02 April 2015, Article number: 9500, doi:10.1038/srep09500