If I understood it correctly, it is a holiday to celebrate the end of slavery. I think that is a good idea, african americans are part of the american fabric, and american as apple pie, I think they will be appreciated as a part of america, and that they got their freedoms. Why are you against if you are? I think 4th of July still every American should celebrate, and do the allegiance to the flag, and do military service etc. I think by adding one but not replacing anything, it is not anti-american.