A few things bother me about the show at this point. Everyone saw the situation with the dragon coming a mile away, too predictable, what is/are the Whitewalkers end game, who are they why do they want to kill everyone, what's their point? Is there a kingdom off somewhere with whitewalker wives and kids running around that they're fighting to protect?
Maybe someone whos read the books can shed some light on this for me????
Everything is so predictable because the show is almost over. Everything is coming to an end, so these predictions we are making are very informed. They aren't like they were at the beginning of the show where we knew absolutely nothing. And remember most of the people creating the popular theories are people who have read the books which have been out for 20 years. So the theories/Predictions people have been forming for a long *** time are finally starting to come true, and countless others have been proven false. Did you see the Night King getting a dragon in season 4? or even in season 6/first few episodes of season 7? Probably not, yet they've had GRRM's outline of the series from the very beginning. The show shouldn't be unpredictable purely to be unpredictable....that seems like whats happening with the Arya-Sansa-LF plotline, and it kinda sucks.
White Walkers were created by the Children of the Forrest to fight off the First Men who were invading their lands, killing them, and burning down their sacred Weirwood trees. So they used magic to shove a piece of Dragonglass into a mans heart, and he became the first White Walker. The Children used dragonglass to control the White Walkers, but eventually they could no longer control them and the army of the dead they created. So, the Children and the First Men allied together to defeat a common enemy - the White Walkers.
So basically the White Walkers were created with the purpose to kill the living. Also, throughout the show we've come across many Gods. The two main ones have been Death and Life. The God of Life being The Lord of Light and probably 6 of the 7 "New Gods", and probably the Weirwood trees the Children of the Forrest/North believes in. The God of death is the ones the Faceless men prey to, the Drowned God, and the Stranger (one of the "New Gods"). And The White Walkers might be a representation of the God of Death (remember Beric and Jons talk this episode?). Who will be the representation of the God of Light? Likely Azor Ahai/Prince that was Promised - who I think is Jon.