Here is a page from the Standard Reference Encyclopedia (late 1960s). First off, they actually depicted Muhammad, something they would never, ever do now. And secondly, look at the description, "Mohammed, founder of Islam, with the sword and the Koran, symbols of his faith."
That was then -- this is now.
I went and checked my World Book (hardcover) Encyclopedia from 2001 (pre-911) and was shocked to find that the crime of whitewashing and propaganda was already in full practice. No photos of Muhammad. No mention of jihad wars, land appropriations, cultural annihilations or enslavements. No mention of the sword.
Instead, Islamic propaganda provided by Ali Hassan Abdel-Kader, with additional sourcing by dhimmi extraordinaire, Karen Armstrong.
Read more :http://atlasshrugs2000.typepad.com/atlas_shrugs/2011/08/media-mainstreaming-proselytizing-islam-to-children-hey-kids-its-jihad-.html