For some reason God still seems determined to protect America from her own stupidity and evil. It has survived and prospered when for the first 50 yrs. or so there was no check whatsoever on immigration or even records of immigrants. Even after there began to be some type of control (passed against the influx of Chinese) the border with Mexico was essentially merely a line on a map with people free to come and go unencumbered by regulation.
So there is every hope we will survive. Dealing with the criminal element in all groups is the essential key to many problems with immigrants.