It's when people don't respect others' religions or others' beliefs that people get upset with atheists. Which can be said for any person of any religion. It's unfair to get upset with one group of people just because they can't hold the same beliefs you do. As long as you can defend what you believe, that's all that matters.
And for the record, if you believe in God, someone has the right to ask you about it and get an answer besides "JUST BECAUSE BIBLE SAYS." Know what you believe. Don't spit out nonsense and hope someone else agrees with you. Listen, be flexible. Religion is such a fascinating thing if you really talk to people about it. When you close your mind to others' perceptions, you're missing out on a wealth of knowledge and understanding.