It seems pretty unfair that you would be labeled as untrustworthy for being an athiest. All the women in my family are pagan (except for me, who can't decide what she believes, just like you) and I once caught an old woman who'd been trying to hand out scripture packets screaming in the face of one of my sisters that 'people like her' were responsible for everything wrong in this country because they were all in charge and none of them know God. My sister, to note, has a habit of politely turning such things down, explaining that while she is glad that the people handing them out can take comfort in God, His ways are not her ways. Apparently that was enough to drive this woman crazy and make her start spewing blame. I had a water bottle in my hands at the time. I pointed out to her, loudly, that if that was true, then why do all these politicians thank God for their places in office and tout on being good Christians? Obviously she was just trying to condemn others and pass judgment where she had no right. I strongly advised her to re-read the passages in her bible dealing with judgment. I'm 99% sure the Bible says to leave it to God, right?

I then maybe told her to leave my family and my friends alone or I'd baptize her myself. She didn't believe me until I started opening the water bottle. It's funny how fast little old ladies can run to their cars sometimes...

So yeah, I've seen people decide to place blame just because of the beliefs, or lack of beliefs, of others. The trick is to remember that all groups have their beliefs, their ideals, and their flaws, but a few set standards can be universal to any religious group or sect. There are laws that all people should follow and traits that all people should share, not on religious grounds but because it will make them better people. And tolerance is one of these traits. Just because they don't seem to trust you doesn't mean you should respond to that with mistrust yourself. Just hang in there and prove by action that you can still be a good person. If they really take the words of their own guides to heart and try to be good people, they should be able to respect that. If they can't, they're not worth the breath it takes to argue anyway.