The difference being that there is plenty of evidence direct and second hand that there was a holocaust. Denying that is moonbat material. Evolution has never been witnessed. Denying what has never been witnessed - ever - is hardly moonbat material. Buy a better argument. A third grader could pick that apart.
Nope. The analogy is perfect. Small and specific events were witnessed -- the larger sweep of events can only be inferred therefrom.