Discussing religion with friends can be very beneficial to yourself and your friends, because if you can discuss topics without personally attacking one another, there is much room to learn and grown in your own beliefs by taking others views and evaluating them against your own. If you do not evalutate yourself, there is no way to progress.
There are some things that just have to be talked about. Miley Cyrus is not one of them. However I have talked about why Miley Cyrus shouldn't be talked about, but that is more of a philosophical reason rather than a religious reason. Anyways Jesus is my Lord and Savior.