fishfingers15
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If the White Walkers are the good guys it is going to make an interesting reveal especially considering all the effort over the centuries to buidl and maintain the wall. So far we are led to believe the wall was built to keep out some ancient evil, but instead it might have been for evil to keep the good guys at bay. Essentially it would show that man was the evil, not his gods , since most in the south do not follow the Red God, but the Seven.
Obviously the others serve some purpose. Perhaps they come back when mankind is losing his way, they thin the herd so to speak, culling out the evil to give the good a chance. Certainly right now Westeros is messed up and pretty much all of that comes down to the plans of men (and women) who are only looking to gain power for selfish reasons. The people might need some sort of savior right now.
feck it, White Walkers are the league of shadows. Liam Neeson FTW