Thankfully, we were prepared with enough ammo - how it would stunt education, devalue scientific discoveries and cause divisions where there would not have been any. If you enforced politics into literature in past, present and future text - at the very most there would be concerns of brainwashing/paranoia; at the very least, some people would lose interest and not read at all. Could you imagine the drive to find more and more 'neutral' books and just how boring that would be? A horrible Orwellian world of sanctioned books etc.
Edit ::: I forgot to mention that I used the children's story 'The Very Hungry Caterpillar' as part of the argument. Try stuffing politics into the life cycle of a butterfly, you will come unstuck.