Compared to their forced labor camps and harrassment campaigns of their critics, I'd say there are definite better things to focus on than apocryphal (but certainly possible) stories that persuade no one. It may be published in several unauthorized biographies and "vouched for" by a bunch of people who may or may not have even been at the convention, but it might as well be a story overhead in a bar for all it's going to persuade the credulous, who want to believe them with every fiber of their beings.

Logic and fact is needed, not conjecture.