Of course if a child is part Italian and part Chinese, you now have a different race. I get that. But from genetic testing you can still get an idea what part of the world your racial background is from (which is what 23andme does). Examples:They can identify what population group you are from, but that's not the same as identifying race.
The problem is that there is more genetic variation within any one group then in between people you identify as different race
https://jameskennedymonash.files.wordpress.com/2013/02/james-kennedy-ancestry-results.png
http://4.bp.blogspot.com/-nqdiDcxgW9s/UTZbsbS0_YI/AAAAAAAAVBY/PNbqDyd-lvc/s1600/me-01.png
https://i.ytimg.com/vi/MoKZDfo1oxA/maxresdefault.jpg
Also your assertion that being against Islam is racist is completely absurd. Islam has adherents from almost every race in the world, so does that mean I hate everyone then?? Again, Islam is NOT a race! Get this through your thick skull. Just as Scientology is not a race either. I hate scientology just as much as I hate Islam, I consider both of them to be a cult. Since most scientologists I've seen on the internet are white, do I then hate white people as well??
Dont be silly