So Christian values cannot actually be assumed to be the right values at any given moment in time.
NO, slave owners were not practicing Christian values. They lied when they claimed that they were. Christian values are always right, some who claim to be Christians are not.
Of course they were practicing Christian Values.
Slavery appears in both the old and new testaments.
It is advocated for, not against.
That is simply not true. Slavery was present in those times, but it was not sanctioned by Jesus Christ. Much of the Bible is a historical record. Your ignorance makes further discussion on this a waste of my time.