Unfortunately its not just "youngsters" who lack the critical thinking skills and/or intelligence to be influenced by "nonsense". What these laws are really about are trying to ensure that easily-influenced people are only influenced by government nonsense, rather than nonsense that the government frowns upon. The bottom line is, that to have and maintain a decent society, you need a population that is (to a large degree) informed, aware, and possessing of critical thinking skills. This is true whether you are talking about criminalizing frowned-upon speech or the "fake news" phenomenon that has been popularized here in the United States as of late. The core problem is that those at the pinnacle of our society (the permanent overclass of the ultrawealthy, oligarchs and intelligentsia that control governments and other levers of power) want to have it both ways. They want a largely ignorant, easily-influenced populace that they can control and influence while at the same time having a populace that is immune to ideas that are frowned-upon (by them). Since this isn't possible, their only alternative is to try to silence the "nonsense" that is frowned upon. We see this in Germany via this hate speech laws (which are largely aimed at stifling dissent over their massive influx of North African/Middle East immigrants and the resulting problems), and in the United States via Russiagate (which is an attempt to paint those who oppose the CIA/DC/NATO narrative as traitors or Russian agents [see the treatment of Jill Stein, Ron Paul, or the WaPo's Propornot article as examples]).
https://www.washingtonpost.com/business/economy/russian-prop...