Why did communist propagandists focus on aiming their message at children and young people?

To adoctrinate the next generations.

Explanation:

Since the future of the nation depended on having the next voters and citizens already formed and persuaded to be in line with the Communist ideas, the main reason to aim the propaganda to the young people is to adoctrinate the future of the country, this way they will have more control over the next generations.

the puritans were a group of people who grew discontent in the church of england the common unity strengthened the community.