Pax Augusta
Elite member
There are some people of European background usually that like to present Indoeuropeans as 'warlike' but 'pre-indo-Europeans' or non-Indpoeuropeans as 'peaceful' or weak in one way or another etc. The truth is most IE groups at least seemed to have been generally 'warlike' but many other non-IE groups are presented as warlike too.
Indeed, this is the idea held by some German Nazi and Italian fascist thinkers of the early decades of the 20th century. They are not even worth mentioning. The idea of the 'Nordic' Romans (with all the positive qualities that are implied) set against the 'Middle Eastern' Etruscans (peaceful, weak, corrupt, devoted to the futile pleasures of life). As kingjohn said, this is propaganda.
It would be interesting to see how much of this propaganda survives today within the general theory of Indo-Europeans. In the social imaginary/collective imagination it certainly survives even today.