What do you believe brought the Uralic languages then?
Not what but who.
It did Uralians/Ugrofinians who came here from Asia through Syberia in quite not far past,
what was always witnessed surprisingly by folklore, language, race and archeology plus
paleolingustic research wich is showing IE linguistic substrat everywhere where Uralians
live, supplemented by IE mythology among Ugrofinians from Lappland to Syberia.
The matter of debate is when, but always was consider the time of 2-3 thousands years.
Could be, that some pioneers came eariler, but Ugrofinians didn't take over the north
until quite recent times, maybe it was finally even in the first millennium CE.
The racial change is showing, that Ugrofinians probably increased slowly survivung some
depopulating events better than other people who lived there in the past. Imagine, that
yet 900 years ago, in whole Finland lived 20-40 thousands people. Since the time when
firsts Ugrofinians arrived and when whole area was totaly IE, passed then at least 3000
years. And yet only so few people lived there, having in the past and in the future many
depopulation events, like killing half of the population in XVIII century (mostly men, the
more higher in the society ladder) what obviously influenced not only final racial change
(cause Finns at that time were still described as partialy mongoloidic) but also increase
of ugrofinian N-bearers - lot of women widowed and remained married (logicly more from
higher classes and from more IE part of society) and many ugrofinic peasants and herders
survived better in the villages and in the forest, so they quicker recovered and could more
multiplied - also with preswedish and swedish women. Simiraly could be in the past.
In 19th century additionaly 15% died in pestilence, what also could influenced
the population - like race and haplotypes. So all of this could and surely did
support growing of Ugrofinian influence on the north - the more in the past
when people were very rarely inhabitating these lands. Founders of N-lineages
are also not so old, at best 3000 years the oldest ones.