I find the "Atheists are just picking all the bad verses" argument to be poor. It doesn't matter that there may be good verses and morals in the book when it is also promoting slavery, rape and genocide. You don't give someone a pass because he gave to charity right after killing 30 people. And I'm sure someone following Hitler or Stalin could have found plenty of quotes and things they did to try and portray them as a good and moral people. It doesn't justify their actions any.
It is a bit of a stretch to say the Bible is "promoting" slavery, rape and genocide. The Jewish law has restrictions on slavery. The definition of rape is a moving target and the genocide- if you can call killing the occupants of a single city that- takes place in a legendary past. Beyond anything else the book is anachronistic, not evil.
For example- "an eye for an eye, a tooth for a tooth" today is basically a prescription for revenge. In the past it was a moral argument for measured response in a tribal conflict, where escalating retribution could far exceed the original offense.
Of course Atheists are picking the offensive lines. What sense would it make to have a billboard that says"
"Whatever you do to the least of these, my brethren, you do unto me."
"Consider the lilies of the field, they neither spin nor sow"
"Suffer the little children to come unto me"
Well, throw in a leering priest and maybe that last one would work.