IIRC, before WWI some Germans said that only war creates true comrades and a true nation

Blood creates comrades and nations

*common blood (from genetic heritage)

*spilling one's own blood with others while together spilling the blood of 'the enemy'

This idea was one of the reasons Germans were so ready to go to war--the years of peace had weakened Germans' belief in themselves as brothers united in a strong nation.

I believe there were people in many European countries at the time who believed their countries needed 'blooding' to become strong again after having become weakened by peace.

I suspect the alt-right and the US nazis have similar ideas.