You are quite correct.
I read both Franz books, Gentile Times Reconsidered and some other books which I can't remember the name of.
The trouble is, people believe what they want to believe irrespective of the facts and I quickly realized this. Many people have been blindly following the 'truth' for so long that, when faced with a challenge, instead of questioning their beliefs cognitive dissonance will cut in like the governor on an engine to compensate for the lack of 'proof'.
You just have to let them be as it is a case of the blind leading the blind.
To spend your time trying to prove them wrong actually in some way qualifies or dignifies the false message that they preach.
If I told you that I was from the future would you waste your time tracing my lineage and my history to prove that I was in fact born and raised over the last few decades???
Of course not. And in time I realized that arguing with an active Witness about their false take on the Bible was doing my own intellect an injustice.
Apathy is the best medicine for them for if you don't take them seriously they will find it increasingly more difficult to take their own message seriously.
Persecution only serves to reinforce their own preconcieved notion in line with what the WT has them believe.
That said, an acurate and well documented history of the WTS is of course neccessary for those wishing to gain an objective view of the movement so I do not critisize anyone for that but you do reach a point when you have to let people believe what they will.