I honestly don’t think this has a single thing to do with his POW service. I don’t know of anybody trying to change what they’ve publicly stated as the symbolism behid the keys.
They’re fixated on his WIFE’S homes.
But that would soon grow old and back fire on them...
There was a thread here about that- there were posts made at DU that explained that McCain had said in an interview some time ago that the jangle of keys reminded him of his jailors in Vietnam. The DUers were argueing about whether or not the jangling of keys was appropriate or would end up making them look bad. The key thing is a double message with the dims, houses/POW by their own posts, I think they deleted the posts. I read them before they deleted and they were aweful, but some freepers captured them. The key/POW deal supposedly started at KOS, and was meant to make McCain lose it and prove to the voters that he has PTSD and should not be President.