"How did these people almost conquer the world?"
Well, you gettin the idea that the rest of Yurp ain't that smart neither?
The only country tough enough to withstand them was U.K., and they did it with their brains. Our Motherland, you know.
To challenge your post (because of my national pride):
1. There are more Americans having German than British ancestors.
2. I wouldn´t be too sure that the Brits would have won WW2 if not for the help of the US (ammo, equipment and later bomberplanes and men).
the piezo electric thingywhatsis'es that start gas grills and pilotless gas stoves. Potato guns work off of some kind of gas fumes, not gunpowder.