Addressing the thread, Why should we refute ----.
Simply because a world view based on imaginary (fantastic) deities is not likely to be very effective at reducing the pain and suffering that goes on in the world today. (Even us rabid Athiests don't think that's nice)
The Abrahamic religions have held sway over about half of the worlds civilized people for some six thousand years and still have not managed to govern in a nice way (for everybody) yet.
From the Jews in Canaan, to the Moors in Spain, to the Emperor of Japan, and the Muslims in Sudan today Diests of one sort or another have inflicted more pain and suffering on humanity than any other idea that the imaginations of humanity have inflicted upon themselves.
You all know that partheogenisis is not observed in mammals. Yet one has virgin births. We are all familiar with Issac Newton. You have bodily ascensions (Christ and Mohammed). We are familiar with sexual reproduction. You give us "original sin". We are familiar with economic theories. You give us "Chosen peoples".
Christians especially should realize how ridiculous it is for them to deny facts and observations and embrace "fantasies" in their efforts to understand and control the world and its inhabitants.
If you don't think Christians seriously attempt to control the world and its inhabitants why is it necessary for homosexuals to get married
Why did the Jackson girls mammary gland cause such a stir at the Bowl game? The Ten Commandment fuss in the courthouse?
It is a sad commentary on our society when a display of young womans mammary gland (primarily intended to feed infants) excites more comment than the probablities of the leader of the free world lying to his citizens about the reasons for war, killing and pillage.
We Athiests are particularily interested in refuting Christianity (along with the other fantastic ideas that appear from time to time) because there is a very real possibility that some nutty Diest will blow us all up for the aggrandizement of his particular God, whatever he calls it!
Personally I have no interest in prematurely examining the myths about Heaven, Hell, or Paradise.