Interesting.
I suppose the correct answer is perhaps.
There are several factors that would have to be addressed
What are the requirements or conditions of this particular god? What does said deity demand from a worshiper in order to be considered a true believer? How strict are the tenets and how much leeway does a worshiper have to adhering to them? How does this god say to treat those who are not “true believers”? Are all people to be treated the same? Are non-believers considered to be less worthy and therefore their lives are of less value? What about the treatment of those inhabitants of the world who are not human? What about the world in general? These and many other questions would need to be answered in order to consider in a specific deity would cause followers to actually drain good from the world and that is without even getting into whether there is good or evil or whether each is merely derived from our own perspective.
Just for grins, I looked up the basic tenets of the Christian faith, they are as follows:
1 –Jesus Christ is the Only Way to Eternal Salvation With God the Father (Or the only way you get a reward is to believe that someone else can get you in, you cannot do it by yourself and will be punished if you don’t believe. Morality? Ethics? Conduct? Evidently not important.)
2-We Are Saved by Grace Through Faith – Not by Works (Or it doesn’t matter what you do as long as you believe what you are told so morals, ethics, conduct be damned; anything goes.)
3 –Jesus Christ is the Son of God (Or therefore kind of a god in his own right. Addresses only the deity, not morals, ethics or conduct.)
4-The Incarnation of Jesus Christ (Or a guy was made by a god then turned into a god and this is a one time event so again, the son is the most important figure, gods intermediary. And again, morality, ethics and conduct not a consideration)
5 –The Bodily Resurrection of Jesus Christ from the Grave (Or “Look what god could do for everyone if he so chose” but let us play life out instead)
6 –The Ascension of Jesus Christ (Or “Hey look! The dad let the son into heaven”. A miracle but again, doesn’t tell you how to live only what to believe)
7 –The Doctrine of the Trinity (Or we suddenly realized we are not really worshipping one god and we said there is only one so we must combine all three incarnations and call them one)
8 –The Holy Bible is the Inspired and Infallible Word of God (Or this is our holy text and there are no mistakes in it at all. If something doesn’t make sense or contradicts itself you do not yet understand and look on the bright side, you can pick and choose the parts you like that suit your particular moral and ethical bent.)
9 –We Are Baptized With the Holy Spirit at the Moment of Salvation (Or when you agree to this and begin believing our way then you can get your “get into heaven free” pass. Again, anything goes now that you have this.)
10 –Regeneration by the Holy Spirit (Or believing as we do will make you a better person and this is the only way to be a better person and anyone who does not have this is scum and will be punished and therefore less than you)
11 –The Doctrine of Hell (Or very simply if you don’t believe as directed you will be punished but you don’t have to worry about it [see Tenet 9]. Full of non-believers regardless of their behavior).
12 –The 2nd Coming of Jesus Christ Back to our Earth (Or everything will be better at a later date and it will be brought on by someone else, not ourselves so nothing we do really matters [see tenet 2]except whatever we can do to make it happen sooner than later)
I can see how these tenets could be misused by clergy or even the individual for their own ends. I know that they are fleshed out in religious texts but they seem rather focused on the deity itself rather than the actions of the followers.