O you miss it?, I'll put it back for ya.

resurrected Butt 2011-2011

See, that's where you messed up.  Usually, when the booty is taken away from me, I go through extreme measures to get it back.  I was this close to paying your rent, buying you a cell phone, and taking you out to dinner and a movie! You should have held out!

Oh, and Aliens suck.  Humanity for the win. (tried to put this thread back on topic)

Not a chance if they had technology capable of travel at light years distances they would simply nuke us from orbit if they wanted as we have no way to counter such assault.

We would be dooooomed

I'll admit I am not completely knowledable about that area, but from my perception of it I feel most conservative religious people (of any religion) who see any alien life form as 'an abomination' as it contradicts the idea that humans being created in god's image and effectively being his 'chosen race'. Conservatives would likely see aliens as 'creatures of the devil' and attack them, more or less satrting another series of crusades. 

First we need to know what their grand strategy is. Is it Total Anihiliation? If so, we don't stand a chance really. Occupation/Extermination (without destroying Earth's natural resources)? Then we can stand a chance.

Of course, there's a lot of open endedness to the scenarios, but the main weakness atackers have is LOGISTICS. This is the biggest key advantage we have. They're invading us, probably from a very distant area. If this is so, we can possibly win a war of attrition. If they run out of fuel, ammunition, or food, then they are defeated. We have to attack their supply lines, and prevent them from replenishing their resources. This is essentially the same thing the Russians did when they were invaved by Napoleon, or what Fabius did when Hannibal invaded Rome: http://en.wikipedia.org/wiki/Fabian_strategy

We need to attack their supply routes, and we need to avoid a direct confrontation. Guerilla warfare and hiding out is the best thing to do. Pitched battles will only result in our losses and lead to them being moralized.

The rest is really open ended. Maybe their weapons or style of warfare has a weakness. Maybe we can go all War of the Worlds and try biological weapons. But essentially we should be looking back at similar examples where countries were invaded by a superior force.

I couldn't help reading this with a Zapp Brannigan voice.

depends... will they probe me? LOL

The only way we would be an alien visitor on this planet would be if they came here to talk, explore, they were very trust worthy and naive and we just blew and fucked shit up after giving them tea, if they came here to raid/take/kill.... we would not survive

There's a chance that by the time we'll get invaded, we'll possess similar technology to that of extra terrestial life.
If we were to be invaded right now, it would be a one sided battle for aliens.
Oh yeah, here's a good read for people who think that aliens don't exist:

http://en.wikipedia.org/wiki/Fermi_paradox

If comes to religion related stuff....well, I'm thinking of two scenarios. Either the Church will state that these extra terrestial beings were created by hand of God, effetively changing whatever is in the Bible to Church's liking, which will take care of whatever "credibility" they have left..or that they simply won't accept that there is race of intelligent beings other than humans (or animals on Earth if we count these) and they will begin war themselves, even if aliens would come in peace.

...oh well, maybe religions won't exist anymore when we'll get invaded so it won't be a problem <- wishful thinking