*We (I am also Dutch) might care about climate change, but that is independent of this infrastructure we already need anyway. Why is this article talking about what we think about climate change only to go into the infrastructure we need regardless of climate change. Article is great but the title is way too clickbait, the content of this article are unrelated of what the Dutch think about climate change..
Because the infrastructure you "need regardless of climate change" is needed because of reasons that make your country much more sensitive to ocean levels rising from climate change.
As thus, the (not related to climate change) need for such infrastructure that you had, makes climate change all the more real and dangerous for you than for someone in Montana.
It's like a driver with unstable breaking mechanism in their car (due to it having sustained some previous damage) is much more sensitive to the alert of a snow storm coming.
Not because it was some prior snow storm that caused their issue, but because their issue makes it much more dangerous to drive on a snowy road.
It's quite simple.
The argument is not that the Dutch believe more on climate change because they have already dealt with it in the past.
Rather it is that for the Dutch the climate change is not a hypothetical, but a very real danger, being as they are already under sea level, that they are more inclined to believe in it and see precautions taken against it as necessary and not as a "drag on the economy".