This generation is rightfully feeling like they're getting a sore deal.
So it could be:
- the native young population who are now flocking in the AfD
- the people fighting the AfD in the street
- the second generation immigrants born there
- the very recent immigrants
- a mix of all
Because the alchemy of creating a working army and "esprit de corps" is much harder than in a corporation. You cannot just take a modern managerial approach to creating an army.
A mix of all will end up obviously in a disaster but selecting on any group will end up in a civil war or coup.
Why would an army that directly mirrors the civil society be a bad thing?
We have been told in most stories that this is a time when people come together and stand up but this is really propaganda.
The reality is most people go a little bit crazy and paranoid in these situation. Understandably.
For example, friendly fires have always been very much under reported. Can you imagine what it lead too when an army is already a bit suspicious of each other?
The result has been fairly inconclusive. What happen is that people generally keep their views about in-groups and out-groups, but then add exception for the person they get exposed to. A good experience/friendship do not translate to a change in definitions for the in-group, nor does it change existing negative generalizations of the out-group.
What has shown to be effective is demonstration of shared values by the out-group, while at the same time avoiding display of different values. When people share the same values, and more importantly, do not display a difference in values, then the in-group can be expanded.
If I remember right, the book Behave by Robert Sapolsky goes through this.