A "right" which the United States protected for "four score and seven years" and which remained legal in the North until 1865.
What sort of hypocrite tries to denounce a conduct that they themselves engage in?
That the *Union* fought the war over slavery is a demonstrable lie, yet it is a lie that comforts the people who did the murdering and destruction, so it has become a popular lie.
You need to grow up and recognize that the *UNION* did not invade the South to destroy slavery. They invaded the South to destroy economic independence from the North.
The North fought the war for money. They fought the war to HANG ON TO ALL THAT MONEY THEY WERE EARNING FROM SOUTHERN SLAVERY.
(3/4ths of the trade income going to New York was created by Southern Slavery.) 
The Union fought the war for greed, and then claimed after the fact that they were fighting for some moral good.
No, it was sheer corrupt greed, and they murdered hundreds of thousands of people to satiate their need for power and money.
Look at the money evidence. Stop listening to the propaganda and start counting the dollars going to the North from the South.
You are correct, the *Union* fought the war to keep the United States intact as one nation, which they clearly stated at the time in 1861.
On the other hand, the fact that *Confederacy* seceded and waged war on the north in order to PRESERVE SLAVERY is ALSO a demostraable FACT, and their OWN documents of secession state that directly and clearly.
And yet many you still want to glorify an evil government created for the EXPLICIT cause of enslaving human beings, and continually FALSELY claim it was started over "states rights" when their own actions and constitution demostrate otherwise and that they were not interesting in giving state governments any "rights" that could be used to curtail their precious human cargo. You celebrate and champion the "heritage" of a "nation" created to promote an unspeakable evil against human beings.
You sicken me.
You are correct, the *Union* fought the war to keep the United States intact as one nation, which they clearly stated at the time in 1861. The decision to use the war to abolish slavery came about much later.
On the other hand, the fact that *Confederacy* seceded and waged war on the north in order to PRESERVE SLAVERY is ALSO a demonstrable FACT, and their OWN documents of secession state that directly and clearly.
And yet many you still want to glorify an evil government created for the EXPLICIT cause of enslaving human beings, and continually FALSELY claim it was started over "states rights" when their own actions and Constitution demonstrate otherwise and show that they were NOT interested in giving state governments any "rights" that could be used to curtail their precious human cargo. You celebrate and champion the "heritage" of a "nation" created to promote an unspeakable evil against human beings.
You sicken me.