Given that the Republicans have failed to elect any African Americans to the presidency or vice presidency in all this time....they really don't have a leg to stand on in this.
Most of us Republicans prefer to select our candidates based on actual qualifications, rather than based on skin color or other irrelevancies.
Your side got a Black President elected, which accomplished, more than anything else, a vivid demonstration of the folly of choosing a political candidate based on skin color rather than on any meaningful qualifications.
When it happens that the best-qualified candidate for President from our side happens to be Black, then that's who we'll run as our candidate. It hasn't happened yet. It hasn't happened yet on your side, either, but you didn't let that stop you from putting a corrupt, incompetent scumbag into the office, just so that you could claim the honor of the first Black President.