Was Hitler one of those damned over-dressed, boombox-voiced snake-in-the-heads?

look at the undeniable proof:

In WWI he lost his sight due to gas, yet "magically" regained it,

look at one of his speeches on tape, he sure yells like a Goa'Uld, and from time to time you can see his eyes glow.

he was obsessed with acheological digs for "proof of Aryan supermen", more likely he was looking for proof of his origin, or even teh "Chappa Ai" itself. With the stargate he could call his alien buddies and dominate Earth.

Look at Stalingrad, he specifically told Paulus that the 6th army should sit there and get killed, instead of retreating to maybe win another day. That is a typical Goa'Uld strategy (as shown in Stargate SG-1 episode 2, season 5)