It is ridiculous, indeed. Theism vs. atheism are just two ways
of seeing the same reality. As you mentioned, Christianity has
morality codes attached to its beliefs. So, Christians feel
insecurity or a threat to their morality when someone denies the
foundations of Christianity.
I made a few posts in this forum. I grew up as an atheist and
accepted Christianity later in my life. I admit, the reason I
made the posts was the feeling of insecurity in my own beliefs.
So, reading and making the posts made me think a lot about my own
beliefs. I am thankful to this website, because now I found very
good reasons *for myself* to believe in Christ. I realized what
it really means *to me*. It does not matter what other people
think, whether Christ was a real person or not and whether any of
the events in the Bible took place. If Christ exists only in my
mind and my heart, that's very much real and good enough *for
me*. Christianity helps me to make and justify my decisions and
makes me happier. That's all that matters *to me*. If atheism
does the same for atheists - I'm cool with that.
Although the specific debates are rather meaningless, I still
find this forum useful, because it helps each party to justify
their own ideas in their own eyes. Internet is a great place for
these debates. In person it might get more ugly. I have a
friend in a forestry service who took survival classes. They
were instructed that two topics are an absolute tabu for a group
of people in a lifeboat or a similar survival situation -
politics and religion. Stick to women and sports. It's a lot
safer.
Here are a few quotes about argument and debate which both sides
may enjoy.
http://www.bored.com/findquotes/cate_534_Argument&Debate.html