Multiculturalism, Mass Immigration, Might of Thoughts

My next question concerns the mixing of peoples. You and Quetzal as well as Semjase, all of you had previously explained to me, that the mixing of peoples in great amounts, as they, for example come about through wars, asylum seekers and whole-migrations or partial-migrations of peoples as well as great emigrations and so forth, portends an extremely great danger for the existence of the humankind, namely due to the widely-varied mixing of bloods and genetic-influences, etc., as a result of which the human being would become soft and unable to cope with life as well as becoming susceptible to disease. As a result, as you have explained, over time would emerge suchkind degenerative changes in human beings, so that some and different peoples or tribes and so forth, would become extinct. For this I just wanted to ask if I interpret that correctly?