They are two sides of the same coin. Religious wars are not totally absurd absurd, they make sense against the background of economics. EVen the crusades becomes far more clear when the issue of economic power is laid over it.
Likewise, economic wars tend to carry an element of religious ideoloy. Even the wars that are officially not about religion carry religious undertones, or at the very least, include an ideological framework that mimicks religious belief.
Not really. He's saying that people divide along some line, and religion is marker of culture. Take Ireland, please. The divide between the people of Northern Ireland isn't really between Catholic and Protestant mythology. It's a divide between socialist idealist whiners and people who are living in the present.