They were treated poorly because of the same reason the Nazi's treated adult jews; it was because of their heritage. After they were sent into camps, it did not matter how old they were, no one was spared of his wrath.
If you want to know exactly what happened to them with great visuals, I suggest plugging "Children of The Holocaust" into YouTube and finding a great visual explanation to go along with your research.
You are correct. The uneducated people were the ones that thought the planet was flat but the educated people knew the real shape of the earth.
January 28th, 2017 is the Chinese New Year
The nobility controlled the majority of the land in France