"It is saying something definite and particular about God and where he does not belong."
No, it is saying EXACTLY the opposite. It is saying NOTHING about the existence of God.
The existence of God is not the issue. The manner and degree to whoch God may or may not be introduced in a scientific context is the issue. Stating that "God is beyond the purview of science" is definitively atheistic. It specifically names "God" as the object of exclusion. How can science exclude something it claims to be "silent" about?