I'm with Will. And I doubt you could explain to me what "true Righteousness even means.
There's no disrespect intended toward Christianity in that -- just that your knee-jerk intolerance causes me to doubt your belief.
Knee jerk intolerance is one of the countless flaws found in all people to varying degrees. This is what the Bible teaches. So the comment was not inconsistent with true belief.
The point is that atheism cannot explain the existence of objective morality. All it can do is support the existence of subjective morality—for example murder would be no more immoral than picking daisies, it’s all only opinion.