Sweden had a pretty weird situation 10-15 years ago. The two parties that were traditionally resisting too much immigration turned around (M and S). Probably because, like all European countries, Sweden needs immigrants to keep the demography sane.

Meanwhile a political party with a neo-nazi history caught the spotlight (SD), which made it even more difficult to criticize immigration.

It was like a perfect storm, making immigration a very difficult subject to have a moderate opinion about.