During NATO bombardment of Belgrade in 1999 a lot of people actually refused to go to shelters or basements after few days and they started to "have parties". Not being able to work much they visited each other constantly, drunk heavily, and pretended that nothing is happening. But it's not healthy behavior. It's not normal reaction.
I couldn't get my brother to send his three sons ( 10, 8 and 6 at the time) out of the country till bomb exploded at the next city block...When I argued that children will  be psychologically damaged he would say " No, they sleep during bombardment time"...He was in denial...
What is normal? Hard question. Having to shoot  another man or be afraid that he will shoot you doesn't sound like normal part of one's life.
Then again, it is complex...Not everyone can be surgeon/operator , and stay normal...I am not saying they who kill in war are all insane...but they are not their "old" selves any more...


Science without religion is lame, religion without science is blind...Albert Einstein