Those who claim that there is such thing as "absolute truth" invariable also claim to have discovered what it is, at the exclusion of the rest of the universe who differs in anyway. No one ever really says, "Yea, there's such thing as absolute truth, and that guy over there's got it. But I don't."
Such claims are far more based on personal pride and ego, and an intense need to be right above all others, rather than anything real or tangible. For if such an absolute truth really existed, there would be infinitely more agreement among people as to what that truth is. There would be some universally accepted, and objective criteria with which to evaluate and confirm that it is the "absolute truth." But, alas, all the support we have for those claims are based almost exclusively in theological doctrines and interpretation.
People aren't "rejecting" this "absolute truth" out of some desire to reject god. They are rejecting the claim of "absolute truth" due to a lack of evidence to support it. Cough up of the goods, and then maybe then we'll really have something to talk about.