I think what frustrates me is that they can spout off all they want about their religion and it's accepted, but if I were to even casually mention not believing in God, I'm sure I'd have an influx of "concerned" family members trying to get me to be religious again. That's the main thing I totally hate about religion, the total intolerance of anyone not believing exactly the same thing that the religious do, and constant proselytizing.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.