My comment doesn't contradict anything that you're saying. I pointed out that America has made many grave mistakes, such as slavery, and that we can still improve America today. The words of the Declaration of Independence are an inspiration and mandate to work towards the goal of equality.
Our founding fathers were certainly hypocrites and flawed men, but that doesn't invalidate the truth of their words.
Our founding fathers were certainly hypocrites and flawed men, but that doesn't invalidate the truth of their words.