Its like the homeless problem. The dems allow it as they can always clean it up later. Once they own all the prime property and they are ready to build, they will simply pass a few laws and bring in the police to remove the homeless from the downtown and the beach areas.
Same with the immigrants. They are needed to sway the elections. Once political power is attained, the dems will simply ‘push’ the immigrants somewhere else. Into the country, the desert, the sea.. they don’t care. They can go back to where they came from if it suits them.
... and just as with the bums and their “hovel communities”, sooner or later (presuming the politicians and unelected bureaucrats want to maintain some form of society and acceptable standard of living) this must be dealt with ... often forcibly so, as the bums and squatters won’t leave on their own.
Eventually, we will have Soviet-style luxury dwellings everywhere for the "newcomers."