invest in production of weapons for the Nazi army?
It seems to me that it would not be proper for God's Organization to voluntarily give money to someone to be used for the exclusive purpose of producing objects to be used in warfare- but it has not been shown that the wt actually did that. Case in point: The wt receives contributions of such like stocks or the wt made an investment in a company that at the time of the investment was not involved in the production of weapons.
So: no connection between Watchtower and Ford, except they are on the same list