A black conservative wonders: How can some Conservatives claim to be the "Party of Lincoln," yet defend the Confederate Flag he fought against?

(From Black & Red)
The black Chicago-conservative blogger writes:
"
Last week, disturbed, racist, Dylann Roof, shot 9 black Christians in South Carolina. The attack has led to Republicans facing myriad questions about gun control, racism and the tangential issues that arise when complex crimes like this occur. One of the foci of the tragedy is the Confederate Battle Flag that flies on the grounds of South Carolina’s Capitol building in a Civil War memorial, and adorned Mr. Roof in many photos he took before the massacre. The Confederate Flag has long been a point of contention between Northerners and Southerners, liberals and conservatives, blacks and whites. That said, Republicans should take a firm stance against the Confederate Flag not just as a sign that we welcome blacks into our ranks, but because the flag symbolizes everything our Party is against.
“You don’t like people from outside the state coming in and telling you what to do with your flag. In fact, if somebody came to Arkansas and told us what to do with our flag, we’d tell ’em what to do with the pole; that’s what we’d do.”
Michael Cooper of the New York Times reports that an independent conservative group used Huckabee’s comments to attack Senator John McCain (then, running for president; and an opponent of the flag flying over the state capitol), and praise Huckabee. The group ran an ad saying:
“John McCain assaults our values…Mike Huckabee understands the value of heritage.”
Are Republicans so clueless to the negative symbolism the Confederate Flag portrays–especially to blacks?"