A lot of the men who go for Asian women, do so because [they couldn't get White women's attention](https://youtu.be/Bk_v6BWW0Nw?t=350), or all their relationships with White women failed, or because they are old todgers still thirsty for youth. And it's not always about taking women from East Asian men. Japanese women who are older, like 25 or more, aren't desirable for Japanese men to marry, because of fertility. And if they are too tall, they also tend to struggle dating Japanese men, like a 5'8" girl here is normal, but over there they see them as a freak. I think you are generally correct, because the Finnish have the Saami admixture, and it doesn't seem to be a problem. There is also generally some Mongolian admixture that you can see popping up in Europeans. It's nowhere near of an issue as Negroid admixture. But it's very difficult for a HAPA boy, they are very noticeable and things are going to heat up even more with racial tensions, they are also more effeminate looking than they would be if they were 100% European. East Asian men are the least desirable in multiracial societies, and this carries over to HAPAs even though they are more masculine, and have more pronounced features. In East Asian societies however European "Hāfu" receive a lot of positive attention. That being said, South East Asians have Australoid admixture, they're not exactly the same thing as "[Sinid](http://humanphenotypes.net/basic/Sinid.html)," and some Japanese are part[ Ainu](http://humanphenotypes.net/Aoshima.html).