Estate's experience mirrors mines. I am a White male who was also raised in a more religious kind of family in Kansas . Was never a part of the in crowd in high school and lost my virginity to an emo girl (who was an amazing fuck btw). In college I was more of a recluse (not by choice though) because I couldn't fit in with the Greek Scene that dominated the school, didn't blossom until later on in my college years. Most ONS were from foreign girls (European, more Eastern Euro but dated a German girl), White girls in more of the alternative scenes (emo, hipster, etc.), and some from girls of minority groups. Years after I am starting to see some results with the kind of girls OP desires.
Reading this thread I have seen some good advice given to OP but I can't believe people are being naive and comparing these women to just any other women. To see their value, just look up any pro escort. The ones who fit the blonde bombshell image charge more than all of the other kind of women. My ex who is German (natural blonde) says she cannot believe how much attention she gets here in America compared to Germany.
Point being, the blonde bombshells you are chasing after know their market value. They know what kind of guys they can have. Famous athletes, famous actors, musicians, and men with power. What you are seeing is guys who have maxed out what they have getting with these women and this goes for almost every group.
I have seen what guys who experience success with Blonde bombshells are like and it is indeed different than going after a beautiful Latina or a cute hipster girl at a cafe. These women are generally more shallow, image focused, and picky.
Did some work and looked into guys of your background that might have had success with these women, Naveen Andrews (from LOST) came up. Here he is kissing such a woman and it isn't some shoot for a movie:
This is Manish Dayal from 90210, I remembered him from a few episodes and have seen his pics around a lot.
He does seem to show up in a lot of pics with this girl, they aren't dating but I wouldn't doubt he has been with girls like her
There are men of your background doing well with the kind of women you are going after. I won't deny that being your ethnicity (or any minority group) makes things harder but it doesn't make them impossible.
For these kinds of women you are going to have to take another angle. Instead of running the same daygame you would run, invest in other things.
1. Get a better physique, single digit bodyfat and high muscle tone. It will take time but this should be your main focus.
2. Find your passion in life and become good at it.
3. Change locations because if you are some backwards area then these girls are not going to consider you an option.
4. Find ways into their social circles, I don't find cold approaching working too much on them since these girls have horny dudes hitting on them all the time.
This will take time and results will be slow but that is the price you have to pay. Till then if you love blondes so much you can game European girls who are more receptive, go for ones who are more lower class (trailer parks, urban areas, etc.), or maybe consider seeing a pro.