At the time
the Panama Hotel was built, there was no illegal immigration. Travel papers were not a strict requirement until last century. The Asian labourers for whom The Panama Hotel was built bought a ticket, got on a boat, and sailed to Seattle.
Most white Americans are descendants of people for whom passports were a strict necessity. Citizenship is a ludicrously recent concept which governments use to hold their citizenry hostage to pay taxes and fight wars. The next time you thank a veteran for xes service, ask yourself, did their service make you less free?