As already said, probably we should separate religion from wars since current wars are mainly caused by money, oil, etc....
However we can't forget that there is a certain sense of detestation between the countries where most people adopt one of the two main monotheistic religions, while neither "polytheistic" people nor atheists are involved in nowadays media covered wars.
I think that polytheistic religions are an easy step towards a natural religion (where Nature, which comprises MANY DIFFERENT events, is THE god).
If people were afraid (and fascinated) of nature, people "might" forget skin colors differences (don't tell me it's a solved issue, please) and so on.
I'd prefer people afraid of Godzilla (a sort of Tsunami god) instead of Bin Laden (OT: I believe more in conspiracy theories than in media theories)