Because slavery is a moral issue.<quoted text>
Failure to read thy Bible in not a valid excuse.
The Bible God also incorporated his brand of morality into the laws he gave his chosen people.
In the following,
God outlines his moral law regarding the buying of slaves:
And as for thy bondman(slaves) and thy handmaid(slaves) whom thou shalt have -- of the nations that are round about you, of them shall ye buy bondmen(slaves) and handmaids(slaves).
Moreover of the children of them that dwell as sojourners with you, of them may ye buy, and of their family that is with you, which they beget in your land, and they shall be your possession.
And ye shall leave them(the slaves) as an inheritance to your children after you, to inherit them(the slaves) as a possession: these may ye make your bondmen for ever; but as for your brethren, the children of Israel, ye shall not rule over one another with rigour.
One more example of God's morality on display follows:
And if a man strike his bondman(slave) or his handmaid with a staff, and he(the slave)die under his hand, he shall certainly be avenged.
Only, if he(the slave) continue (survive the beating and live) a day or two days, he shall not be avenged; for he(the slave) is his(the owner's) money(property).
There are many more examples of God's "moral" law which have very little to do with morality but the point has been made.
So according to this slavery is just fine as long as your personal God endorses it.
These types of pious Christian claims should always be given a swift kick right out the door of reason into the garbage can where they belong.
That does not follow that the Bible does not have morality. You started by saying there are NO morals in the Bible.
Now you are trying to change the subject. Do you now admit that you are wrong, and that the Bible does contain morality? Whether you believe such morals or wrong a right is an entirely different matter.
And, the science does not support you, since once again, Western Civilization was the first, EVER to outlaw slavery, and call it moral sin to own slaves.
No, that is not in the Bible. But not all Christians subscribe to Luther's Sola Scriptora, for which you argument would have to be based. The Church also as ORAL tradition equally as important as WRITTEN tradition, which condemn slavery outright.
Now how did that come to pass? Could it be that REGULATING how slaves was treated put into the minds of others the dangers of slavery entirely, which lead inevitably to its condemnation as a whole? History proves that this is a resounding yes ... minus Luther's Reformation which allowed slavery to creep back into the West temporarily.
You argument still fails, and Christianity is proven to be morally superior to all other moral systems, on HISTORICAL data alone.