Depends on their personality and personal views. It is good to be aware of what the person might be extremely sensitive to and to not start them off with a topic that would shut down their ability to reason. It is also important to trust the friends ability to judge the content for themselves and to not deny their experiance.
The podcasts about atheism were pretty terrifying for me to even see. I first skipped over them. I then began to listen to them a little bit, but more to find faults, and when I couldn't, I would skip to another podcast. I felt a strong urge to discredit Stefan's "views" on the subject, but I couldn't simply because I couldn't disagree with the arguments. It took more than a few years for me to over this hurdle, and thinking back, it is quite amazing I was even able to make it over the heavy level of indoctrination and abuse in my childhood. What I found amusing was that I only really started diving into the topic of atheism after I became an atheist.
All I am saying is to be sensitive to the fact that people are programmed through their family, culture, and the school system. It is a difficult and long process, and you can't expect any argument or podcast to reverse years and years of indoctrination, especially when someone fully projects their family onto the state.