The United States imports a Montana-sized population of almost entirely non-White foreigners EVERY SINGLE YEAR. This has been happening for decades, and hasn't changed under Donald Trump.
The US is the blueprint for the demographic decimation of White populations.
Instead of pretending we're prepared to save Europe through the power of tweets, perhaps we should look inward, acknowledge that we're the world's worst casualty of mass migration, and start by abolishing the Hart-Celler Immigration Act that opened the floodgates of a 90% White America in 1965, and managed to minoritize White American children in their own homeland in less than 60 years.