Personally, I find these kinds of philosophical discussions of Atheism/Deism and morality to generally be a huge adventure in people having wildly different definitions of God and morality.
As a "Christian," most of the versions of God that atheist describe, I don't believe in either. But that's largely the fault of evangelicalism and the Westernized ideas of God the have become popularized and not the atheist perspective themselves.
I think imagining "God" as a verb more than a noun is a helpful start in a better picture of God. I actually believe that the very "engine" of the evolutionary process of the universe could be described as God. As the universe evolves into greater complexity and awareness, we begin to have more of an awareness of our role within it and to care for it and each other.
Personally, this is why I have no issue or problem with the idea that Atheist have an equally strong morality and ethical compass. It's not so much as subscribing to a dogma or doctrine as it is to align yourself with the care and love for creation and your fellow human. While this might be called humanism to the Atheist, regardless of what you want to call it I believe it is tapping into the very creative source of life and love that began the whole universe.
This will probably be written off as mystical bullshit by most. That's fine, as it's hard to summarize this perspective without coming across that way. As a Christian, if I really do believe that God is "reconciling all things to himself." I am optimistic that, despite our differences, our various perspectives are working together to create a better world when we try to love our fellow human and find common ground to care for the world we are in.
Of course, as a Christian, I find great inspiration in the life and teachings of Jesus Christ. To me, if there ever was a embodiment of the very nature of the way I think we should treat each other and live, I think his life was a great example. And to quote Jesus, "If you've seen me, you have seen what God is like." What the institutions have done with it since then though, is another story altogether.
Essentially I applaud anyone, regardless of belief systems, who is trying to live for more than themselves - who is willing to speak out on behalf of the oppressed, the powerless, those without a voice. The people that are building schools, hospitals, creating art, caring for the sick, protecting the innocent, raising families, etc. are all doing part of the work of what I believe is God. And I just don't find it to be overly important to force them to declare allegiance to my specific ways of thinking for it still to be true.