Appealing to the two thousand year history of Christian theology hardly supports Frame's case. A cursory glance at the controversies within Christian theology must surely banish any illusions of the objective nature of Christian belief and of the moral doctrines which rest upon them. Although Christians may agree that an appeal to historical evidence should be used to reconcile their differences, such appeals have hardly been effective. The many sectarian and denominational squabbles, the numerous heresies, the schisms within the major churches show that any objectivity associated with Christian belief is illusive. Yes, there has been some agreement among Christians.
Frame points out that there have been conflicts in philosophy and science.
Whatever the rational status of philosophy, theology can only be compared to science to theology's disadvantage. One obvious difference is that scientific controversies are not settled by appeals to claims about miraculous events occurring two thousand years ago. In any case, the question is not whether other disciplines are free from controversy but whether a Christian foundation of morality is objective. Enough has been said to cast doubt that it is. As for science, I think Thomas Kuhn's writings indicate that science has often shown denominational squabbles very similar to those in the church, although it has also gone through periods of consensus on some established principles, as has Christian theology on the doctrine of the Trinity since 381.