Two Perspective of Modernization

Many of sociologists of religion have claimed that religion in modern era die out. Max Weber attributed this phenomenon to the scientific knowledge. Lerner, Inkeles, and Smith emphasized too from a cognitive perspective to the role of high level of education in modernization.

There is another perspective, namely to call existential. Turning point of this trend is economic development. Accordingly, in "Modernization, Cultural Change, and Democracy" Inglehatr and Welzel argue: the higher level of economic development, the lower belief in religion. It means religion survives and its existence is, at least in poor countries taken for granted.

But I want ask just a simple question:
Why religion is in some rich Islamic countries among others Saudi Arabia and Kuwait alive, active, and firm?