I just couldn't let this pass without making a few remarks.
Where there is a lot of truth in your words, as a fellow Netherlander, I disagree to a few things too.
First and foremost, don't make the Bible Belters (and the anti-vaxxers and the complot theorists) not bigger than they are. As you are well aware, the Dutch parliamentary system is the most democratic in the world. (For anyone not Dutch, in Dutch parliament there are 150 seats, and at election day an x amount of votes is being casted. To get one seat in parliament you need to get (x divided by 150 = y) amount of votes)
The SGP & ChristenUnie combined gained 566,524 votes out of a total of over 10 million legal votes (at the general elections in 2021). And with that amount of votes they gained 8 seats out of the 150 available. The fact the ChristenUnie (Christian Union) was part of the rightwing government doesn't mean they have much of a say. Together they can never make a difference, and the laws of our country mean that abortion, as well as euthanesia as well as a few other things that other countries frown upon are very legal.
I had a little look at our demography. The population of the Netherlands:
Half of us state (according to wikipedia:
https://nl.wikipedia.org/wiki/Bevolking_van_Nederland) that they have no religion. And nearly a quarter say they're Roman Catholic. And only 12.2% state they are protestant or reformed. Which is pretty much in line with the numbers in the general elections of 2021.
But those nearly 25% Catholics, that number is interesting. 23.7% to be exact. Roughly the population of the Southern half of the Netherlands. Or, in other words, Noord-Brabant and Limburg, which were part of Spain. Burgundy like (Bourgondiërs).
But it means that the Netherlands is a made up country. And in my opinion, the borders were wrongly set in 1830, when Belgium separated itself from the Netherlands.
The old Provinces of Holland, Zeeland and all the provinces north of the rivers should be one country, Noord-Brabant, Limburg and Flanders another country, and the French part of what is now Belgium should be another country, with arguably Brussels as a city-state.
Again, it all aside, because I'm coming to the point you tried to make. I had a good search for the opinion on abortion in the Netherlands. And while there have been protests from the 1970s (as per this:
https://nl.wikipedia.org/wiki/Abortus_in_Nederland) No real numbers are mentioned. And thus it's small amounts, not even the Bible Belters, but more the Anti vaxxers and complot theorists.
I sincerely and wholeheartedly disagree that the majority of the Dutch is still fairly conservative (and thus suggesting they would be opposing to abortion, euthanesia etcetera). Even more, the very right wing VVD (Liberal Party of the Netherlands) has been a front runner to make those things into law. And even the extreme right Geert Wilders and his PVV are supportive of abortion and euthanesia.
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A few other things, most of the exporting agriculture (flowers and greenhouses) are located in the Randstad. The Westland is in the heart of the Randstad and the bulbfields of the Keukenhof are located about next to The Hague (the biggest village in the Netherlands).
And currently the biggest industrial area, making the most money annually is Brainport Regio Eindhoven. with ASML as frontrunner.
The Holland Golden Age is disputable to say the least, but what do I know, where I live we were part of Spain in those times.
And lastly, my apologies to all non-Dutch speakers for posting two Dutch wiki links.