For 2 simple reasons:
1) Rh incompatibility
This is when a woman is rh negative, carries the antibodies and carries an rh positive fetus.
http://rhesusnegative.net/rhdisease/
How do you avoid it? Simple. If you are an rh negative woman, look through our list of rh negative men. See someone you like? Great! Give him a chance. If you marry an rh negative man, your children can only be rh negative as well meaning you will not have any incompatibility issues during your pregnancy.
And rh negative men: There is a shortage and demand for you. GIve an rh negative woman a chance as well. She will appreciate this natural solution rather than having to deal with potentially major complications.
2) Blood type personality traits
Popular in Japan and Korea. And very real as well. Since there are so few rh negatives in either country, I have taken the liberty to highlight the personality traits of all rh negative ABO groups:
http://www.rhesusnegative.net/staynegative/rh-negative-blood-type-personalities/
For all the others, there is Wikipedia:
Any questions? Ask below!
and people who think they are so evolved and tolerant and progressive because they marry initerracially are hypocrites because they claim to love all races while simultaneously making sure the future has none of them. its not respectful to either culture to kill them both
it seems like the powers that be do not want people to know about the fact of there being more than one humanoid species on earth, but seriously how could that not be the case. we clearly are very physically different, and even though its possible to reproduce if you get some special treatment/injections thats clearly not what nature intended,