And it's not just gun control. There is an epic cultural transformation occurring that may very well put the cultural revolution of the 60's to shame:

Robert Reich: 6 Ways Millennials Will Clean Up the Mess Baby Boomers Left Them (Video)

Millennials are different from boomers in 6 important ways that will shape the future.

1. Millennials are more diverse than boomers—so as millennials gain clout, expect America to become more open.

2. Millennials are more distrustful of the political system than boomers—so as millennials gain power, expect more anti-establishment politics.

3. Most millennials have a tougher financial road than boomers—so expect them to demand changes in how we finance higher education.

4. Millennials view the social safety net differently than boomers—so expect them to demand that Medicare and Social Security are strengthened.

5. Millennials care more about the environment—so expect them to demand stronger environmental protection.

6. Finally, as wealthy boomers transfer $30 trillion to their lucky millennial heirs, expect millennials to demand a fairer inter-generational tax system.

https://www.alternet.org/culture/robert-reich-6-ways-millennials-will-cl...

Another article that focuses on gun control also describes the cultural transformation of Millennial/Gen Z Americans:

Old theories no longer explain youth behaviors. Gun control laws are weaker and youth poverty remains high. Older generations are displaying more negative behaviors, such as drug abuse and crime. Social programs have been cut back, higher education costs have skyrocketed, and popular culture has become more explicit. And yet, Millennials and Gen Z are showing dramatic improvements in every locale (teenage crime rates are down 70 percent in Idaho, and gun killings are down 65 percent in Texas, for example).

The old stereotypes no longer apply:

Today’s youth could be described as “post-sociology.” That is, as a generation, they no longer act like the popular stereotype and conventional social-science construct of the risk-taking, impulsive teenager. The Millennial/Gen Z signature move seems to be this: “solve” social problems not through political reform but by reducing those problems to irrelevancy.

What's going on?

I believe positive youth trends are a massive counter-reaction by younger people against the disastrous increases in addiction, crime, and imprisonment that their parents’ generation is suffering. Pundits marvel at the size of the women’s marches and the student uprising against guns. They point to how Millennials paved the way for gay rights not through legislative action, but by normalizing homosexuality as routine. Sexual harassment is going the same way, although slowly.

Does the following comment refer to the internet as a whole or does it suggest there may be positive effects from the Facebook and Twitter omniverse?

Statistical and survey evidence suggest enhanced global interconnectedness among today’s youth is yielding a revolution in behaviors and attitudes.

The revolution among younger Millennials and Gen Zers only occasionally resembles the kind of policy-manifesto, demand-specific political movement older generations recognize. The young are not trapped in age-old talking points and battles; their startling behavior improvements are largely the product of the unique interconnections modern technology and evolving tolerance are making available.

The real action is at the hidden, personal network level, where today’s young can freely access the most positive aspects of worldwide diversity.

This is exactly what we need - challenging the broader culture:

But online connectivity augments those contacts and facilitates them almost everywhere in the country, helping to reverse the old stereotypes of self-obsessed, danger-seeking adolescence and isolated, troubled people. New sciences will have to shift to understand this evolution.

This sudden, new student movement can revolutionize America’s gun debate the same way its generation is changing the environment of gun violence if it challenges the broader culture.

They got something to say!

Gun control advocates can work with Millennials’ and Zers’ strengths—not by slandering them as violent and demeaning them as helpless victims, and not just by temporarily championing them as energized advocates for established lobbies’ political agendas, but as a genuine representatives of real change with something new to say.

https://www.rawstory.com/2018/03/big-reason-young-people-dont-debate-gun...

Robert Reich video from first article (4 minutes):