Hi Yomama and welcome to the board ,you do make a valid point but as Vidiot points out the Bible does not and has not condemned slavery anywhere and in fact tells slaves to be obedient to their masters Eph.6:5
Its no wonder that many people say the Bible is like an instrument you can play any tune on .
I hope you stick around there is much to learn on this site ,I have learnt more in the 10 or so years on this site about JW`s than I ever did in my 32 years as an active JW.