Peyroteo
Professional Ronaldo PR Guy
They were created thousands of years ago to destroy mankind but then disappeared to the point people thought it was myth.
The NK clearly had the resources to do this anytime he wanted, so why now? What was the trigger point (there were dragons between the time of their creation and now. Also he started the march south before Dany got her dragons).
How do you know he had the resources to do this any time he wanted? Didn't he expand his army by getting those babies from that incest guy beyond the wall?
It was repeated often that it would be one of the biggest winters and that his army was the biggest it's ever been. It makes sense that they invade now.
If the fact they didn't spell out everything about it bothers you then watch the prequel they'll make about it.
To make them out to be some sort of 'they are evil just cos' is pathetic. No character in the show has been black/white or good/evil - so to make the NK just evil with a single thought and having no logic is poor writing
This happened 3 years ago when they literally showed them being created and told you exactly why they were created... I'm not sure what the confusion here is.