<human>: Can you provide a brief rundown of the text in within 3 sentences?

I'm an Agnostic living in the bible belt of America. I'm just wondering if any of you guys have any insight to my dilemma. I work retail and on more than a few occasions, while on the job mind you, I've had Christian people approach me with an array of 'gifts' and viable information on how to save my soul. One one occasion in particular, I was ringing up an older gentleman. He payed for his purchase and then said he had something to give me. He handed me a round red stone, like the ones you use to decorate fish tanks. He said "This is the blood of Christ, I would like to give it to you and invite you to my church." I politely declined and told him I was not Christian, but thanked him anyway. He was persistent. He said, " Well in that case you need it more than I thought." That type of comment always ticks me off. Again, I politely declined and told him I didn't think it very professional to talk about something like that while I was working. He finally got the message and left. Here's my problem. When something like that happens, or when in normal conversation with customers and they say something like, " God is great, isn't he?" I just smile and say nothing. I do not agree, but I also don't feel right coming out and saying, " Well, I don't believe in him." It's like I'm damned if I do and damned if I don't. If they can openly say what they believe religiously, why don't I feel like I can? Does anyone else feel this way? And yes, it is a DAILY occurrence. No, I don't work in a religious environment. It's just the region I live in.
<bot>: I'm an Agnostic living in a biased, closed minded Christian state, where I'm sure they would've burned me at the stake a few centuries ago. How to deal?