Re: I'd like to see life....
Not sure if you're aware or not, but there are already religious wars going on in the Middle East. This really wouldn't change anything in that regard. Just another reason to add to their list of justifications for violence.
Also, the last couple of Popes have already laid the ground work for changing a few things if life outside of the Earth is actually found. So, I wouldn't expect a big hoopla to come from Catholics, or really most of the Christian sects.
Really the only big upset might be if we find intelligent life that we can communicate with AND they insist on worshipping the Crawling Lasagna Monster instead of the Flying Spaghetti Monster. I mean, seriously, Lasagna? That's just insane.