Yes it could.
Atheists "believe" there is no god.
Atheists have "faith" that they are right.
Since god can never be proven, then this is just another kind of religion.
re·li·gion [ri-lij-uh n] Show IPA noun 1. a set of beliefs concerning the cause, nature, and purpose of the universe, especially when considered as the creation of a superhuman agency or agencies, usually involving devotional and ritual observances, and often containing a moral code governing the conduct of human affairs. 2. a specific fundamental set of beliefs and practices generally agreed upon by a number of persons or sects: the Christian religion; the Buddhist religion. 3. the body of persons adhering to a particular set of beliefs and practices: a world council of religions.