I wouldn't call Japan's actions in World War II genocide (they certainly weren't trying to wipe out the populations of the countries they conquered), but I'll admit that we didn't much focus on the vast numbers of Chinese killed by Japan in World History.

As for that article: yikes. Luckily, most states are saner than Texas. (I've got a feeling that if Texas adopts an explicitly, unapologetically Christian curriculum, other states will be much warier of following its lead...)