Europe is DONE. Going Brown and you cannot stop it. You're not having enough babies and white is genetically recessive. 
Well, you have to remember white people evolved from brown people. Homo Sapiens moved out of Africa 75,000 years ago first to Asia and then Europe. They then encountered Neanderthals who appeared in Eurasia 200,000 - 250,000 years ago. Comparison of the DNA of Neanderthals and Homo sapiens suggests that they diverged from a common ancestor between 350,000 and 400,000 years ago.
Asians and Europeans have Neanderthal DNA, Africans don't.
http://www.geneticliteracyproject.org/2015/02/23/why-do-asians-have-twenty-percent-more-neandrathal-dna-than-europeans/So really who's to say all these non-white immigrants moving to Europe don't evolve back into white people in 50,000 years or so? We are all related after all.
Even with a lot of mixed race breeding the white race will still be around and humans will be evolving for millions of years potentially so who knows what will happen to all the races? Even the Chinese race could mix in a global world down the road. We are becoming so interconnected with technology that it is inevitable that the world will just be one village.
https://en.wikipedia.org/wiki/Early_human_migrationsHomo sapiens seem to have appeared in East Africa around 200,000 years ago. The oldest individuals found left their marks in the Omo remains (195,000 years ago) and the Homo sapiens idaltu (160,000 years ago), that was found at the Middle Awash site in Ethiopia.[10]
When modern humans reached the Near East 125,000 years ago, evidence suggests they retreated back to Africa, as their settlements were replaced by Neanderthals. It is now believed that the first modern humans to spread east across Asia left Africa about 75,000 years ago across the Bab el Mandib connecting Ethiopia and Yemen.[11] From the Near East, some of these people went east to South Asia by 50,000 years ago, and on to Australia by 46,000 years ago at the latest,[12] when for the first time H. sapiens reached territory never reached by H. erectus. H. sapiens reached Europe around 43,000 years ago,[13] eventually replacing the Neanderthal population by 24,000 years ago. East Asia was reached by 30,000 years ago.
