The term 'illegal person' may have deeper ramifications and has become a scary term

Universal entitlements of all persons regardless of nationality, status, or circumstance, grounded in international law. Includes civil, political, economic, social, and cultural rights. Promoted and monitored through treaty bodies, courts, and advocacy organizations operating at national and international levels.

United States immigration policy and enforcement, and the people it reaches: visa and asylum rules, deportation, border operations and the status of those already living in the country. Legislated rarely and governed largely by executive action and litigation rather than statute.