Just wanted to say there are moral people in every religion and even amongst atheists. And there are unmoral people among all these groups as well. No one should judge and think because they are a believer in God that this somehow makes them more moral or superior to any who don't share their belief. Most of the people who have wronged me in my life and commited acts of abuse against me have been "Christians". Every human has their own moral compass regardless of their beliefs, some just choose to ignore theirs and hurt other people.
I agree with Poppy that we just have to agree to disagree. Since I don't feel I am obligated to convert the world like some Christians feel, I can have good conversations with anyone who asks about my beliefs without arguing to try to prove myself correct. We should find a common ground because regardless of our belief, most humans are interested in the same things: secure future, end of violence in the world, loving families, good health, etc.
I also agree that it is the assumption that believers are stupid that causes the arguement. We are no more stupid or intelligent than unbelievers. We have a right to our opinion and unbelievers a right to theirs. We should not even bring up our opinion unless we are asked. But need to use discretion to make sure the person asking is sincere and not just looking for an arguement.