Even taking you at your word, immigrants also create far more jobs. The economy is not some zero sum thing, with some fixed amount of jobs and fixed amount of work and fixed amount of wealth to be split.

Every economic analysis I have ever seen shows that there's economic surplus from immigrants entering a local economy; more jobs and more wealth is created, per person, than if those people had not come. In particular I'm thinking of some studies of local economy in Miami when there have been bursts of immigration.

Its only racism when you then go and invite white south africans in. And make statements like "Why cant we have more people come in from countries like Norway"

They say it out loud. The people writing these policies are vocally proud of being white nationalists. Defending them with "well maybe they have a good reason!" is evidence that you're either on board with their actual agenda (i.e., evil) or incomprehensibly naive (i.e., stupid).