You guys never watched the movie Wizards directed by Ralph Bakshi???
Here are a few links to what it is:
http://www.imdb.com/title/tt0076929/
Basically here's the plot of the movie:
Millions of years have passed since nuclear war annihilated almost all life on the planet Earth. Civilization has been eradicated, and the few straggling humans who survive have become deformed mutants, banded together out of desperation. Slowly, the planet begins to heal itself, and after a few millennia, life begins to evolve on the planet again. Nature begins to reassert itself, and slowly, the forgotten forces of the world—the magic, the faeries, the wizards, the elves—begin to reemerge all across the planet.
In the land of Montagar, the kindly wizard Avatar rules the land with generosity and compassion. His is a land of sunshine, rainbows, and waterfalls—a total idyllic paradise. In stark contrast, his brother Blackwolf rules the land of Scorch with an iron fist. His is a land of radiation sickness, uninhabitable wastelands, and ferocious mutants. Blackwolf desires to control the planet and take over Montagar and all other lands, and wages a fierce war against Avatar. The courageous elves and faeries easily defeat the evil wizard, beating the invading army back into their own territory.
Technology has been outlawed for millennia, considered evil—the downfall of ancient society. Blackwolf, in an effort to obtain military superiority, has begun to research, excavate, and harness the ancient war technology in order to conquer the foreign lands. His finds include one horrifying discovery—Nazi propaganda films. These, his most powerful weapons, galvanize his troops into hatred and iron resolve. Soon, Blackwolf's forces sweep the world, casting despair and destruction upon the lands. Avatar, accompanied by a courageous elf and a beautiful faerie princess, sets out across the land, headed into Scorch to confront Blackwolf once and for all, and destroy the mad wizard's propaganda machine before the world is plunged into a darkness from which it could never emerge
Its available on DVD here in North America probably over there in the UK too(though its region 1)