The very fact that I am willing to discuss alternatives shows that I prefer education to indoctrination- your implication (if I have understood it) is unwarranted.
You are teaching 11-12 year olds. It is my opinion that a teacher's job is to carefully select material at an appropriate level.
Until university level is reached that involves a large amount of selecting what will be excluded as well as included. Children of this age are not going to have 1/10th the necessary time to make a reasonable analysis. Unfortunately that means they can't be given the entire picture to 'decide for themselves'.
It is your job as a teacher to understand the material well enough to make a professional selection of what will be presented.
There are hints here that you are not in a position to do that job for this subject.