How did stalin use censorship and propaganda to support his rule?

Media is a very powerful tool that can be used for either good or bad. The ones who know how to effectively use media are very powerful. Stalin knew this and effectively used it during his reign. The media did celebrate the accomplishments of Stalin and the Communist Party while at the same time attacked anyone who dared say anything. Likewise the material that showed the government in the negative light was not allowed. Thus he strengthened his rule through the clever use of media and censorship. 

2cars an a racing track so the drivers can race

It has the potential to lead to limits on rights by giving flexibility in making laws.