This article seems to suggest that religion, as a natural component of human behavior, has the capacity to actually "evolve". As such, it makes a lot more sense to fight for religious reform, rather than for the destruction of religion altogether.
The counterpart to that is that even secular ideas become religions. People treat atheism, liberalism, capitalism, etc. as religions, or as the ultimate interpretation of all truth. It makes sense instead to view religion as a philosophy, and to pick the most coherent version and fight within the system for it.
Fighting religion is becoming part of the decline on two levels: one, religion is a helpful part of social order; two, it's a surrogate activity for reforming civilization. More deconstruction, selfishness and isolation is not what we need.