Under scientific scrutiny it is not, tho. Contact interventions are considered the most effective tool to reduce prejudices across domains.
https://en.wikipedia.org/wiki/Contact_hypothesis
https://www.sciencedirect.com/science/article/pii/S014971892...
If you want to get an idea of what a war situation would do to a society like Germany just remember Covid.
A battle between humanity and a virus deeply deeply divided our society. If I remember correctly Germany or Austria were ready to put non vaccinated people in jails.
About every lines of division deepens.
American south? Many contact, few rainbows and unicorns.