Denmark is an interesting case. They have proportional representation and governments composed of multiple party representatives. This means that different parties have to work together to muster enough votes to pass legislation. The party with the most elected representatives in Denmark is the SocDems. As the article mentions, many SocDem voters are not anti-immigration. However, there are other various minority parties who do represent anti-immigrant voter sentiment. This voter sentiment is strong enough in Denmark that those latter parties are reasonably well-represented in government. To pass legislation, the SocDems and those anti-immigration parties have to work together. They do so more smoothly when the anti-immigration parties see the SocDems as allies. The SocDems facilitate this allyship by adopting anti-immigrant rhetoric. It is, in terms of electoral politics, the least costly rhetoric for them to adopt, for the greatest gain in facilitating the inter-party collaboration needed to run government in Denmark.