I've fallen in intellectual love with several posters in Meta this week and your appreciation is flattering.
Did you read this gem by Obamanaut? I just saw it and it left me speechless.
"Redneck" women,TG women etc., were very much not wanted, and were often actively denied participation. They were considered an embarrassment, even by people we often lionized as leaders and pioneers of feminism (ie Gloria Steinem). Steinem has since walked back most of her views on these marginalized groups of women, but she wrote and spoke some pretty hurtful stuff. I don't mean to pick on Gloria, she's just the most well-known.
Also, remember that the above groups of women were often more than one of these categories: a redneck lesbian working in a textile mill for low wages, a black blue collar women working as a maid, etal. Many didn't have the luxury to discuss feminist political theory: they were trying to put food on the table and not get fired for trying to unionize while they worked full time and took GED classes at night.
There IS a privilege for white, straight women with a decent amount of money that many other women don't have. That doesn't mean there is an "Oppression Olympics," but rather that they have less factors that cause their oppression (unless one is disabled). Their main oppression is gender. Not race or class or sexual orientation or education. I can't remember which DU poster said this once, maybe Lioness Priyanka? But it's stayed with me. I'm paraphrasing, but they said you fight about power struggles within your marriage, while we fight for the right to marry. That is very illustrative, I think.
This is why intersectionality also comes into play so much today in modern American society and feminism.
http://www.democraticunderground.com/?com=view_post&forum=1240&pid=97490