No, that is also a 'german racist invention' and little more

(although i was not alluding to Carl Jung's theories at any rate).
The debate on ethno-liguistic links is much older than the heavily political german racial theories of the 19th century. Those links begin with the prehistoric people, and their migrations, and language forming and then having barriers with the formation of its other parts from the seperated groups left behind, or split.
Linguistics is one of the fields that study common roots in terms as well as notions. Notions, of course, predate words for them. Also one should keep in mind that in an endless procession of millenia the prehistoric humans did not have an organised way of communicating their notions in their minds, to others, so the language would contain in the end also some very individual traumas of those seperate groups (that an eternity later would form the first "ethnicities").
Just to give a very very general background of how i personally approach this issue. As i said, it is not about traits, but about a common background through the abyss of time. That one is virtually entirely unconscious. Maybe it is not so, but surely it is a question on another level, and not one on the dumb "racist vs whateverist" kneejerkism commonly seen on the web.