I do think I understand the modernity people. Where we are now is astonishingly different from the past. It is so different that we can't imagine living in the past or imagine our ancestors being able to live in the present time.
The world is very different, I agree. Yet it is not a different world. If that makes sense. We are still planet earth.
Modernists see our present time as something that will have meaning, or will be resolved, in some unknown future time. Traditionalists believe it is our continuous connection to the past that drives how we live in the present.
I think our differing views on whether the past is still relevant to our present time or if the past is simply a completely different and disconnected place, also has a very real effect on what our political and social values are as well.
This is one time I believe in "evolution" without a speck of skepticism. I don't believe we were somehow "created" and placed in this brave new world we live in. Even with its rapidly changing technology and vast array of choices, our civilization is still a growing thing with seeds (and roots) in the past.