Sadly, it seems you suffer from the common mentality that seems rather pervasive among European people's overall, a sense of a kind of self-righteous ignorance, of presuming an equality mirrored on one's own culture, values, ideals, nature, and character; essentially the manifestation of the delusional belief that "we are all the same" and that muddling and mixing falsely equates to diversity.
Reality simply is that not all humans share the characteristics or values and ideals that have emerged from the rotten and pernicious western experience of abundance combined with various other cultural and traditional characteristics. No, the combined 3 BILLION people of India and China are not going to "meet each other, talk and learn" as they swarm and swamp Europe and the USA's measly combined <1 billion population, nor will the 4.5 Billion Africans somehow just want to talk and learn and meet in 2100 when the combined crush of humanity starts really gripping.
We are seeing these articles just now, as a relatively small subset of each of those populations has any means whatsoever to travel and become tourists, just wait until the exponentially rising numbers of them have the means to travel to swamp Europe and the USA, when citizens won't even have the ability to see their own cultural sites or artifacts in anything like peace or focus as billions of "tourists" flood into the relatively few places of interest.
no, this is just the beginning of far greater consequences of ill guided, self-righteous tyranny that is always common to the self-appointed authoritarian ruling class. This is the future you and we have condemned our children to, being overrun and dissociated with our own cultural heritage out of misguided delusional co-dependent and enabling policies of overpopulation of the planet.