The bible and Slavery

Human equality in Christianity?
Introduction: When it comes to human affairs and relations, slavery is one of the back bones of the spine of Christianity and its principles: "All who are under the yoke of slavery should consider their masters worthy of full respect, so that God's name and our teaching may not be slandered. (From the NIV Bible, 1 Timothy 6:1)"
"Let all who are under the yoke of slavery regard their masters as worthy of all honor, so that the name of God and the teaching may not be defamed. (From the RSV Bible, 1 Timothy 6:1)"
"A student is not greater than the teacher. A slave is not greater than the master. (From the NIV Bible, Matthew 10:24)"
We clearly see that the Bible is not a book for freeing slaves. Slavery was practiced very badly during the times of Judaism and Christianity, and was fought against and ended during the times of Islam. It is part of the Bible's "teaching" to practice and promote slavery! And fighting it would "slander" or "defame" the teachings of the Bible.