Mostly true. However how far up the income distribution do you have to be in order to have seen real improvements in the last 15 years, two decades? 20%? 30%? And how low do you have to be to see the impacts coming closer?
And if you are white and male as nearly all Trump voters are there is no narrative for how things could conceivably get better in our "liberal" elites bag of tricks. For anyone else there is at least diversity as a clear offer, even if it is often honoured more in the breach than in fact. But for people who already had all those opportunities TM it's compete or die, no excuses. So I wouldn't say the narrative that this is about globalisation's losers is entirely nonsense, just vastly oversold.

They are culturally anxious and largely centered in areas of the country where diversity has been rising.
This however I find genuinely scary. At least from Europe I am used to a lot of the racist base coming from regions that only get to see foreigners on TV. Once you live next to each other you tend to get used to it. Or rather all the tabloid stories get balanced by the daily experience of not getting robbed by a Turk.
Is that US car culture striking again?