That sucks about the greys!
In my dogs case... I do believe that the couple that got him genuinely wanted him... they had a husky before, along with their golden retriever. I don't know what happened to the other husky, I never asked.... and I'm guessing that he didn't exactly get along with their other dog. He gets along with *most* dogs, but there is that one or two dogs in a group that he just doesn't like... and I haven't figured out a common thing other than it's been mostly huskies (or mixes) or golden retrievers. It is not breed specific though, as he gets along with the majority of huskies he meets and several golden retrievers, including a friend's golden. The couple also said he was food aggressive.
Perhaps the couple were at least being smarter than the person they got him from? I don't know. That first person after all only seemed to care about getting rid of him ASAP rather than making sure no one would flip him and had the money to care for him.
Sometimes though, it takes time finding the right one.