Meta-ethical argument for atheism

[Captain Scarlet]

If the statement god is good has any value, then morality must be independent of god. If morality is independent of god, then god is not the source of morality and therefore god as envisaged by Christianity does not exist. Therefore chrsitianity is false.

How? This argument doesn't seem well thought out.
Are you trying to imply that humans give god the good attribute and therefore own their morality?

No. It is a standard argument for atheism, I couldn't lay claim to it myself. It essentially points out the logical inconsistency of the concept of a moral god. Human morality is not discussed in it's premises nor conclusions. How can god both be the source of morality and be good, seeing as he is judging himself against his own standards.