Except the heritage you speak of was before you had modern liberals declaring that it was a basic right to have your needs provided for by others. They had to come here and work hard just to survive.Donkey_Left
What makes this country both unique and exceptional is our immigrant heritage.
I believe in the big, high wall, with a big wide gate. Anyone who wants to come here to seek opportunity who is not a criminal should be free to. They should be completely ineligible for any public benefits (welfare, medicaid, etc.) until they have been here, working, paying taxes for ten years.
Then the goal of public policy should be to assimilate them. That means an iron-clad requirement to become proficient in speaking and reading English within 5 years to stay, and fluent to become citizens.