Why don't illegal immigrants need visas to enter the US like everyone else?

I've been watching shows about people coming through airports or by ground and needing passports to enter. MIA (Miami International Airport), Gatwick Airport, and Heathrow in the UK. Anyone trying to enter without a passport gets shipped back to where they came from. They take a dim view of people illegally entering the US. So, why are illegal immigrants allowed to pour across the border without identification or passports, like people coming in legally need? This is why we don't need Democrats in charge anymore. I'd ask Biden but he doesn't even remember what he had for breakfast.

Why dont illegal immigrants need visas to enter the US like everyone else?
Why don't illegal immigrants need visas to enter the US like everyone else?
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