Yes, you have easy access to the Bible, but so many people ignore what it says, if they even bother to read it.
There are a few main ways to try and get people to stop following/believing what the Bible says.
One is a direct approach to try to get people to recognise the Bible is wrong and discard it. But with religious beliefs that isn't always the best. People will often try to cling to their beliefs regardless of how you try to show they are wrong.
The other way is much more successful (based upon how people have been in the passed). You don't oppose the religion, you embrace it and give teachings which manipulate what it says. You lead people away from the religion from the inside so they still think they are following the religion, even though they have massively distanced themselves from it. So many people claim to be religious, while almost completely discarding the religion they claim to follow. Christianity is based upon this, with so many Christians discarding the commands of God because of what Jesus allegedly said or did.
If you gave these religious texts to people with no preachers corrupting them into what it thinks, and preferably also no knowledge of reality and asked them what they thought it taught, they would provide answers vastly different from what so many religious people say it teaches today.