Doesn't make sense to go after a planet that's mostly made up of the thing that can kill you. Unless salt water doesn't bother them? Either way, the aliens must've been desperate
shareMaybe aren’t that many planets to choose from.
shareDemons and Foul spirits cannot cross or bear water. It is because it represents God's power and spirit.
That was why the demon was burned when hit with water. Beau was divinely inspired when leaving the water all over the house.
Why did they come after the Earth? Because they swore to destroy it because they hate God and his creation.