Oh wow, this is quite intellectual indeed!
Let me first tell you, I've been raised in, so far as I know it, one of the most strict churches western civilisation has to offer.
One of the most, not directly saying it is the most as I haven't experienced much other cultures and religions.
The reason I tell you this is because I've debated and talked about it countless of times on the internet (Including /r/atheïsm, god that was horrible).
Recently something bad happened to me, I've come to the conclusion that I don't really care about god anymore and totally shut myself out of the church. I'm rational towards christians, because I know what they believe and WHY they believe it. This doesn't make me a christian but just a rational being. As for that mention about /r/Atheïsm, I really felt like an adult discussing with children.
Now to all you people who don't believe; don't know what to believe, I don't know, whatever your vision on this world is, What really bothers you about the possibility of a higher lifeform in this universe?