There's a time and place to embrace and co-opt the language of your enemies but I agree with Mr. Dare that this isn't the time, and 'racist' isn't the place.
Your heart seems in the right place, but I'd counsel you not to wrap your philosophy around opposition to one politician because politicians, like any other window dressing, come and go. You oppose Obama's policies: Fine, so do I. But I, and I suspect you, opposed them long before I'd ever heard of Barack Obama, the savior du jour. So of what importance is Obama himself? Why waste so much bile on a figurehead who'll be gone tomorrow?
Likewise, I'd be careful about putting too much confidence in Rush Limbaugh and his kind. I remember when his show was first syndicated, in the late eighties. I enjoyed it very much; he was fresh and and irreverent, and though he clearly leaned toward the republicans he didn't identify himself with them: He even criticized Bush the elder, sometimes scathingly. All that changed with the phony "contract with America" which he never disavowed even after it was proven a fraud. Since then every republican is a god to him, and every democrat a devil. If I hadn't already known Limbaugh was a worthless ass, his beating of the Afghanistan and Iraq wardrums and his hypocrisy over the Oxycontin/drug war kerfuffle would have done it for me.
Think for yourself. Don't let your supposed friends do it for you, and don't let your avowed enemies define you.