>>509741896We are communal animals. Every foreign human that is within our communities (up to nationstate) brings with it disharmony and lowers social cohesion. The more alien said human being (a white yankee that resides in britain has very negligible influence whereas an african or middle eastern has very strong negative influence simply because he/she is much more distant genetically to native britons) is, the greater the negative influence on that society.
There is no way around this. Modern "multicultural" states have to employ massive brainwashing on children and adults to keep this empty charade of "humans are all the same everywhere" alive. Truth is that every human race is happiest when it can live amongst themselves, without foreigners or alien races destroying communality. We were never meant to live with strangers amongst us. You can see the misery that this forced change has brought to us everywhere if you look truthfully around you.