That doesn't diminish our own complicity in slavery in America.
Define "our".
America's.
None of us alive are responsible for any slavery in America- but our country certainly was.
Just as I am proud of the American Constitution- as an American- I also recognize that our history of slavery is a stain on our past.
That doesn't mean we are a bad country- but it does mean we should recognize our accomplishments and learn from our mistakes.
The United States should feel very proud of our history regarding slavery. It is a noble history.
Slavery had already been an institution on this continent for 300 years on July 4, 1776--longer than we've even been a country. It was an institution established and profited from by Africans, Arabs, Europeans, and Jews.
Slavery had been a normal condition throughout the world throughout history (with some misgivings among the Ancient Greeks, white men) until white Christian men in Europe and North America began framing it as a moral question in the 18th Century. By the time 1776 rolled around, there was a strong enough abolitionist movement in the colonies that promoting slavery was listed as one of the reasons to declare independence in the Declaration of Independence. It was removed only because the southern colonies refused to join the revolution if it was left in.
In fewer than one hundred years from becoming a nation, the tensions among whites over slavery ignited a brutal war in which more Americans died than all our other wars put together. It's the only time in history in which one people fought themselves over an injustice committed against another people.
Since the war, Americans have made enormous effort to bring the freed slaves--an illiterate and alien race--to full parity with the citizens of the country. We have spent trillions and passed landmark legislation and stacked the deck against our own children in order to give this alien race equal place in our civilization--an effort also unprecedented in world history that I know of.
It would have probably worked, too, if not for the presence of the Jew, who has worked tirelessly to promote racial hatred in this country. So fuck you with this "slavery is a stain on our past". Slavery is a stain on the earth's past--oh, wait, it isn't past. It's still widespread in Africa, the Far East, the Near East, and the Middle East. It is past in Christiandom.