I recently posted a book review on immigration law.
The original immigration law from 1924 had quotas for national origin and that baked in various aspects of racism. It sought to keep the racial mix of immigrants at that of the 1920 census. But that changed in 1965 under LBJ. That law favors those with family ties in the US with some allocations for skills needed.
Yes, racism is still out there but its more subtle. It is not part of the law any more.