First, bear in mind that with years of observation of how mechanisms of mass deceit work, I will not be impressed with anything like "most mainstream historians agree...," the more particularly as Ivy-degreed in the field myself and having observed failed historiography both in print and in realms like Wikipedia. Information control is in a few key respects both harder, yet much easier in our day than it was in the days of the USSR. I don't really have time to instruct you in everything or how you need to not categorically dismiss major stuff for minor detail, but if you're seriously interested in the truth, you can try http://www.jrbooksonline.com/fdr-scandal-page/pearl.html for a teaser look at one good start. Like I say, however, if all you do then is find source B that says, "Oh so and so's just a wingnut," you're not a real searcher and the discussion is functionally over. So we'll see.
