No God is mad at your personal choices, this has to do with personal genetic and spiritual hygiene, not some xian-like "commandment". Just like smoking and drinking harms your body and you are advised not to smoke and drink for your personal health, not for anything related to the Gods. This is the same thing with race mixing. It's for your and your children's genetic health, as mixed people have trouble finding bone marrow implants (none of their parents are compatible with them) and have increased chance for genetic defects, emotional problems and bad behavior.
Avoiding race mixing because of fear of what the Gods do is much like teens who smoke in secret because they afraid of how their parents may react, without recognizing that it harms their health. This is teenage mentality. Try to see it from the viewpoint of genetic health instead of what the Gods think about. Everything is Satanism is for your own good, not just to avoid displeasing someone external to you.