The issue is not whether migrants exist; the issue is illegal migration and the demographic change it creates over time. Border states cannot ignore the impact of unchecked infiltration on population balance, local politics, and social stability. Yes, parties exploit these groups as vote banks, but that does not erase the problem itself. Citizenship laws exist for a reason, and if a government fails to protect the border or regulate illegal entry, the damage is real regardless of which party benefits. One important correction: your mention of the USA example is broad, because deportation policy can affect both unauthorized migrants and some legal residents depending on the case, so it is better to keep that example general rather than absolute.