Often times it's said that foreign migrants only make up X percent of the overall population. That X percent doesn't sound so bad. Well here's something to consider. Half the overall population is over the age of 40. (or look at the statistics for the median age in the country where you live, that will tell you the age at which half the people are older than that and half the people are younger) People over 40 generally are not having any more children, and many in this half are in their 60s and 70s and will be dying off within less than a generation. It's the younger segment of the population that represents the future. Most of these migrants are much younger than the median age, in their early 20s or 30s. As the older population dies off, that's going to accelerate demographic change. For example, if migrants represent 15% of the population now, they could easily become 40% of the population in 30 years. That's a far cry from "a small manageable segment of the population".
If they are viable and integrating into society who cares? The problem is many are not doing that and there lies the issue. Parsing into smaller and smaller groups with far differing needs,wants and goals leads to violence and hate.
Immigration to U.S. Dropped in 2017; Still Accounted for 48% of Population Growth... Census Bureau: International Migration to U.S. Dropped in 2017; Still Accounted for 48% of Population Growth January 3, 2018 - Net international migration to the United States declined during the year that ended on July 1, 2017, but still accounted for 48 percent of the nation’s population growth for that year, according to new data from the U.S. Census Bureau.
I want to use my ancestors as an example they are Polish on my fathers side and Scottish on my mothers. My Polish ancestors came here and were skilled workers construction work and tailoring, they worked hard to learn English and about American culture and brought in their culture to and assimilated and insisted their children go to school largely Catholic and pushed for them to go to High School which meant White Color work in the day. Their children had some become office workers, bookkeepers, work in shops and some took their skilled trades work to start their own businesses. Later some became shopkeepers in the Western expansion and teachers and do other work. Eventually college was an option for some to and they entered higher level professions. My Scottish side came in maybe dirt poor but all of them had good educations, worked hard, knew English and were considered British so had no stigma of some of the other groups and many became successful middle managers and trades people or did white color work when they arrived and wisely headed West instead of staying in the cities migrating to the Mississippi region. But all assimilated and learned English or knew English and although kept elements of their roots with pride became Americans. That is not the case anymore if you come in you might be in communities apart from the main society and not bother to try and fit in.
Half the U.S. white population is over the age of 45. For Hispanics in the U.S., half are under the age of 28. 28.5 percent of the current total U.S. population is age 55 or older. What that means is out of a total population of 326.5 million, the U.S. only has a population of 233.5 million younger than 55. Any immigration the U.S. takes in should ultimately be compared to that smaller number, when it comes to both current workforce and the future. (i.e. adding 30 million more people is really going to be increasing the population 13 percent rather than 9 percent, like most might assume) That means that 36.5 percent of the total current population in the U.S. is composed of white people under the age of 45. (calculation: median age for whites is 45, meaning half are younger than that, 72.5 percent of total population is white, 0.5 multiplied by 0.725 = 0.365 approximately = 36.5% ) In Hawaii, Nevada, New Mexico, Texas, and California, as well as the District of Columbia, less than 35 percent of the population under age 10 is white. (source: https://www.brookings.edu/blog/the-...ration-z-plus-is-minority-white-census-shows/ , just below figure 2 )
