re: A few questions from GoT Hardhome (Spoilers, books? etc).

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1 - Some people are saying the White Walkers are evil, however I think I saw somewhere that they are actually sort of ambivalent, just working towards a natural goal?

2 - Are the Iron Born safe from the army of the dead because they are out on the Iron Islands?

3 - The dead that attacked Bran and co at the tree were running and fighting fast. Why are people freaking out about the dead running last night?

4 - How would the White Walkers breach a sealed Wall?

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