When America was a racist country, Democrats were primarily the ones engaged in racism. However, now that racism has been largely relegated to the fringes of American society (the KKK, the New Black Panthers, the Nation of Islam, La Raza, MEChA, Al Sharpton, Jesse Jackson, American Nazi Party, etc.), the Democrats are constantly wagging their fingers about it. Of course naturally, given the racist history of the Democrat Party, liberals have managed to rig the rules in order to benefit themselves and hurt their political opponents. That's a pretty neat albeit despicable trick that they've managed to pull off.
1) Liberals aren't held to the same rules as Republicans: When liberals say racist things, it's just excused out of hand as if it's no big deal. If Dick Cheney had said, "I mean, you got the first mainstream African-American who is articulate and bright and clean and a nice-looking guy. I mean, that’s a storybook, man" instead of Joe Biden, you'd read about it every time he criticized Barack Obama. When Christopher Dodd said, “I do not think it is an exaggeration at all to say to my friend from West Virginia [Sen. Robert C. Byrd, a former Ku Klux Klan recruiter] that he would have been a great senator at any moment. . . . He would have been right during the great conflict of civil war in this nation,” it was shrugged off. On the other hand, Trent Lott ended up resigning from the GOP leadership for making very similar comments about Strom Thurmond.
2) Minority racism must be ignored:According to Rasmussen polling, "Thirty-seven percent (37%) of American Adults think most black Americans are racist, according to a new Rasmussen Reports national telephone survey. Just 15% consider most white Americans racist, while 18% say the same of most Hispanic Americans." This isn't coming out of the ether. Black Americans voted overwhelmingly for Barack Obama over Hillary Clinton because he was black. If George Zimmerman had been black and Trayvon Martin had been Hispanic, most black Americans would have been indifferent to the case or would have supported Zimmerman. This is one of the great ironies of the liberal obsession with racism. While they can turn practically anything into evidence of Republican racism, the most grotesque examples of racism from minorities are just shrugged off.