I can sort of see that.
Young people (for the most part) are just appalled by Trump. Older folks, even older Democrats, can see themselves agreeing with at least some of his stances, like trade protectionism. Millennials really haven't had to live through outsourcing/offshoring the way GenX and Baby Boomers have. Hell, even I get tempted at times by the siren song of "bring the jobs back". But I know that my line of work at least, is affected as much or more by H1Bs as by offshoring. And I also recognize that by and large, the jobs that have been offshored aren't coming back. And forbidding US companies from using offshore backoffice IT would utterly cripple them in the short-term (and never pass Congress). But for young voters, the protectionism thing just seems outdated and close-minded.
But people 30+ are also old enough to remember Bill Clinton and the economic boom of the 1990's. That's a strong draw, even if much of that boom had more to do with the rise of the Internet and other structural factors, and less to do with Presidential policy. Millennials never got to take part in that boom. They've only known the post-bubble economy, wherein we've had two major recessions since 2000, and they've graduated college with tens or even hundreds of thousands of dollars in debt, and finding that the only available jobs are retail or bottom-feeder gigs at giant corporations. So the subconscious link of Clinton=$$$$ isn't there.
So yeah, the idea that young people are voting against Trump, while older people are voting for Clinton sounds right to me.
EDIT: I don't think I'd ever use "incapable" with Hillary. The rest, yeah I'm in agreement.
EDIT #2: I think immigration is another area where age perspective explains a lot. Millenials in many parts of the country have always grown up with a fair number of Hispanic neighbors, friends, coworkers, the guy who runs their favorite taco truck, etc. So it just seems normal, and they don't see what the big deal is.
Older people in many places outside the Southwest remember a time when Hispanics were something of a rarity. When I was a kid, you could count the number of Mexican restaurants in town (and this was a city of 100,000+) on one hand. There were three kinds of "ethnic" food available -- Italian, Mexican and Chinese. Bilingual signs just weren't a thing, even at the Mexican restaurants. Now, they're so commonplace I don't even notice them. And to Anglocentric whites (which is a lot of people), that seems like a demographic/cultural threat, the same as the Yellow Peril. There's the appearance at least, of less cultural assimilation compared to say, the 1970s and 1980s. So even if they dislike Trump personally, they do see some value to clamping down on immigration.
