But the sentiment it contains has been made many times in these very forums -- most often in dialogue. It has been the subject of books (
"Can We Be Good WIthout God" - Dr. Robert Buchman, 2002). (By the way, Buckman, now deceased was a friend of mine, President of the Canadian Humanist Association, a member of my book club, a Jew by ethnicity but non-practicing.
Rob Buckman - Wikipedia)
Theists in these forums have argued, quite aggressively, in these forums that atheists have "no reason to be good, because they don't have the fear of God as a basis for absolute morality." I've participated in those debates, but can't be bothered trying to seach for them now (the search capabilities in PHPBB forums is pretty atrocious).
But the argument often goes like this:
Theist: "Without God you have no reason to be good."
Atheist: "I don't need God to be good, and if you do, then I question whether you are in fact good. I mean, if you lost your faith tomorrow, would you feel better about stealing or murdering somebody?"
Thus, no strawman, and no propaganda.