1. Why atheists spend so much time coming up with ideas to disprove the existence of God? That actually transform them into negative believers. If God exists or not there is no need for believers or anti-believers, we don't matter.
If "god" (by whatever definition you want to apply to that) does exist, he has no meaningful interaction with our daily lives. His fan club, OTOH, do.
Some atheists (Dawkins, Hitchens, et al) feel that the world would be a better place without religion and attack the root cause of religion, belief in god. The reasoning goes if you disprove god, then religion goes away and with it, fundamentalism, attacks on science, etc.
Personally, I'm not sure about this. People who are idiots (creationists) or people who have been oppressed and manipulated for political gain (jihadis) will simply find some other reason to do whatever it is they do.
That said, I am thankful that Dawkins and his ilk exist. They serve as an important counter-balance to the religious crazies. It's just unfortunate that religious fundamentalists tend to occupy positions of power (Ayatollahs, the Tea Party), while "rationalist fundamentalists" are marginalised and ignored.
Besides "is there a god" is a fundamentally interesting question. Religion, for good or evil, has had a massive influence on our society and culture. Even Dawkins advocates teaching the bible in schools, simply because you can't understand many great cultural works without it.
2. If God doesn't exist you must highly consider life to be automatically generated in the universe. The universe is homogenous, the same events repeat everywhere, so you should have life everywhere. But I haven't found a person that doesn't believe in God that still believes in aliens, instead most of the people that believe in God also believe in the contrary solution for life as well.
Well, it depends on what you mean by "aliens". If you mean "life on other planets", I think you'll find that most atheists would quite happily say that not only is it possible, it's highly likely.
OTOH, if you mean little grey men and government conspiracies, that seems less likely for several reasons:
1. If you work out the probabilities for intelligent life, the distances involved are vast, and the energy expenditure is immense.
2. If you did spend all that time and effort to come visit, why would you be subtle about it? Unless you were doing some kind of Star Trek Prime Directive cultural observation, in which case, if you wanted to stay hidden, your tech would allow you to do that.
if you think programming is like sex, you probably haven't done much of either.-------------- - capn_midnight