Whether the taxes are just or not is irrelevant here; pretending people are buying EVs just because they like them better (which is what I get from the headline) is deceptive.
They don’t cost double. In many cases petrol cars are still cheaper than their electric counterparts in Norway. Hyundai Kona petrol, for example, is slightly cheaper than Hyundai Kona electric.
But because of their tax exempt status, the price premium for electrics is much smaller in Norway than in most other countries.
Where does the headline suggest that? It simply states the makeup of sales.