How do the Title VII protections against National Origin discrimination compare to the IRCA(ImmigrationReform and Control Act)requirements and regulations?

Do you think that the recent politicalemphasis on specific groups of migrants (from the Southern border and from certain predominantly Muslim countries)has impacted the current societal view of national origin discrimination, or is it normal that at timesconcerns arise with specific groups (for instance Italians in the first half of the XX Century)?