:::I believe all of them have "special" backgrounds. I can't find the reference right now, but I believe it was Jacob Neusner who has stated that virtually all scholars of Christian origins have intense current or former personal commitments to either Judaism or Christianity, or words to that effect. Bart Ehrman is a former fundamentalist, and not just a fundamentalist, a fundamentalist apologist. In addition, his life's work would be without value if it turned out there wasn't a historical Jesus. Such self-selection by scholars clearly carries a potential for bias, and that has been acknowledged by scholars both inside and outisde biblical scholarship, as mentioned in the article. Nevertheless they are still scholars, and the article can refer to them as such. 
 :::As for academic credibility of theology specifically, it has none whatever, but you have to be careful to distinguish between theology and religious studies, even though there are clear organisational and historical links between the two and there's always the risk of bias. Do note that even where the overlap is apparent, it doesn't by itself disqualify the source in question. 
 :::As far as I'm concerned, the present article strikes a good balance. It fairly refers to scholars who have studied the matter (almost, but not totally exclusively biblical scholars) as scholars, but it also mentions the criticism of the historical professionalism as well as the risk of bias, with mention of opinions both inside and outside biblical scholarship. On some other pages there appears to have been a deliberate campaign to withhold from the reader the fact that the scholars have almost exclusively been biblical scholars, most of them with strong current or former personal commitments to a religion. That is wrong, but I don't see that here. 
 :::In short, I believe you make some good points, but it seems to me that the present article already deals with them in a fair and balanced manner. Your proposed changes seem to me to increase bias, not to decrease it.