There are too many errors in your assertions to address them all individually, and the war ended over 152 years ago.  You might want to reread the article with a heart for reconciliation rather than so much hatred for a society vastly different from ours today who had to survive and who believed that slavery would end in God's good time.  

New York (named after the most prosperous slave owner and trader in American history) was the last Northern state to end slavery, but slave ships sailed from Northern ports and continued to do so even after the Civil War ended, hauling slaves sold by blacks and Muslims in Africa all over the world.  Do a bit of research and find out when Grant finally was forced to free his slaves after slavery was outlawed.  He excused his delay by saying, "I kept them because good help is hard to find."

Having been raised by a wonderful black lady who looked just like Aunt Jemima while my parents both worked, I was blessed to learn that history from her side.