Hi.... remember it is the wt way of discounting the fact that they have it wrong. So regardless of what any secular source might say, if you bag and rubbish the source, that means it is no longer accurate [in jw speak that is] Remember the comments of Ray Franz in Crisis of Conscience. That was part of his job on the writing committee. If you cant find a credible source to back your erroneous position, then criticize the cridible ones. Make them sound wrong.
The have forgotten about all the archeological work done in the 20th century that supports legitimate history