The issue has been long resolved and published. Humans, as is the case in all creatures, are selfish except in some cases to tribe, family, friends, local community, team members, etc. Selfishness preserves the gene and in its absence the specie disappears because the specie is not able to protect itself optimally. The special cases such as unselfish behavior during war or disaster are well understood. The Selfish Gene is a well known book on the subject. I believe humans can be taught to be unselfish and still survive but modern humans might not be able to do so for reasons too complex for discussion here. Unfortunately we do not teach our children to be unselfish. The Mother Teresas of this world are rare. Israelis are not different from Arabs with respect to selfishness. They certainly treat their children and women far less selfishly than do Arabs. Jews historically needed to protect themselves against other religions and if they they are selfish there is good reason.
North Korea insists it 'regrets,' not apologizes, over mine blast that killed 2 South soldiers (AP)
from the article: Are we born racist? A new Israeli study has some surprising answers