Many Christians haven’t really read the bible, only selected, edible parts. Quite a few actually become atheists after having read all of it.
Hardcore Christians and Christian apologists don’t care one way or another, no matter what their holy book says, not deviating in any way from what they want it to say, but there are those reacting strongly to passages like these:
Slaves, obey your earthly masters with deep respect and fear. Serve them sincerely as you would serve Christ. Ephesians 6:5
You may purchase male or female slaves from among the foreigners who live among you. You may also purchase the children of such resident foreigners, including those who have been born in your land. You may treat them as your property, passing them on to your children as a permanent inheritance. You may treat your slaves like this, but the people of
, your relatives, must never be treated this way. From Leviticus 25:44-46 Israel
Kill every male among the little ones, and kill every woman who has known man intimately. But all the girls who have not known man intimately, spare for yourselves. Numbers 31:17-18
This should give anyone ignorant a certain idea what the Bible is truly about.