Please, cite the relevant law I'll be accused of violating and any existing precedents of prosecutions (successful or not). I'll wait.
Blonde is "race". If you discriminate against "fair haired" people, that will be considered under race. There are thousands (if not more) of cases on race.
There are no laws defending blonds or red-heads against discrimination by brunettes either.
Yes, there are. If you discriminate consistently against blonds, then you will be open to legal action. You are using a strict definition of "race", and the application of the laws doesn't work that way.
How about folks, whose name begins with "Mi*"? There is not a law anywhere in the world (!) explicitly protecting us — how do you sleep at night knowing of this ongoing travesty?
Has there ever been a documented case of someone discriminating against a Mi based on name? No? Then why do you think you deserve special laws?
Oh, well, if we start counting omissions, we can get really far.
I've seen some that explicitly list LGBT (as a non protected class). That's not an omission, but a license to discriminate. Is that any different?
Get hold of portable property. -- Charles Dickens, "Great Expectations"