War is a very bad situation, but this war was even worse. The soldiers could not even tell who the enemy was. Even the soldiers on the same side were sometimes fighting each other. Also, the people at home didn't completely support the soldiers. So there were many bad experiences and many came back with their consciousness damaged.
Broken consciousness comes from karma.
The only way to fix your consciousness is through strong practicing. First, every day do bowing practice. Slow, slow bowing. Next is mantra. Only try, try, try mantra.