Sadly, all this factual data will not and cannot be reasoned upon by the vast majority of J.W.'s who are now dumbed down by "the two greatest commandments" - obey the org & believe the org! They will simply dismiss such historians as being inaccurate - as other historians have also been.
Which is why I personally feel that exposing blatant anti-Bible teachings such as confession to 3 elders, "new" scrolls, and the "great tribulation" myth have more chance of success with folks whose thinking has been blunted.