As a result, socialism and communism, in particular, use government to suppress religion to such a degree as to leave the one true God out entirely.
God is in charge, and alone sits as the ultimate government over His creation. All other governments are then to reflect His ultimate rule.
The primary role of the church is to reflect God's value system in society and to train people in that value system. It's not the government's responsibility, nor are they equipped to do that on the most local level where the need exists.