While doing research, I noticed that of the countries in which the Nazi government incentivized extramarital births between German fathers and Aryan mothers, Norway's reaction against the mothers and their children is most documented and the most severe. Is this due to the extent of the Nazi programs in the country, or based on other factors such as scarce resources being allocated to the care of these families during the war?
This is obviously a subject that's controversial even today. I recently wrote an essay about the treatment of the children and mothers, and while I did not really compare them to other nations, nor found conclusive evidence to WHY this happened, I feel I can give you some answers to what you are asking.
First of all, when Norway was invaded by Germany, there really wasn't much of a resistance. The Government fled to London, and the Norwegian army was a mess from day one. Basically the only noteworthy thing to happen was the sinking of Blücher. The Germans met very little resistance, and the invasions was over in the matter of days.
Norway during the rest of the war was a rather dull place to be honest. There was small pockets of resistance(it got quite large as the war went on), but in the grand scale, they were only a mild nuisance compared to other occupied European nations. The Nazi-Invaders was quite lenient towards the population. There are of course examples of things that should not happen, but again, if you compare them to other European nations, they are barely mentionable. As the world was at war, there was a lack of certain things, but few people in Norway starved(I mean obviously there was less food, but not a famine) or died directly because of these lackings in food and medicine. There was probably incentives (I haven't researched this part enough) to having a relationship with Germans, and carrying their children, but it was never an extreme cause of survivability.
The majority of the Norwegians kept living their normal lives, and there was a form of popular passive resistance, as in a lot of other European countries. There was Nazi programs, but they were never very popular.
As to why Norway's reaction towards these children, their mothers and towards girls or women who had relations with Germans was so severe , the answer is complicated. As you point out, these women did get some benefits, and some of the reaction was no doubt caused by that alone, but I feel it's important to acknowledge the fact that a lot of Norwegians felt very frustrated by the lack of resistance Norway put up when they got invaded in the first place. The Norwegian Prime Minister at the time was a pacifist, and had spent the last 7 or so years pacifying Norway, who relied on their neutrality status (which they failed to uphold). This combined with the fact at near the end there was around 40.000 members of the resistance called "Hjemmefronten", and the war ended rather "peacefully" in Norway, meant that there was clearly a call for vengeance in Norway. And even if the government was to blame, they were not interested in taking the blame. So basically the "war-children" and other collaborators with the nazi's was made scapegoats.
Norway had a lot of controversial trials in the aftermath of the war. It speaks volumes that only a handful of the sentences was carried out in the end.
Sources: (I don't have all the books in front of me, so there might some stuff that isn't 100% correct).
Johannes Andeæs. Norway and the Second World War (1966) Per Ola Johansen - På siden av rettsoppgjøret