I always viewed Genwunners as the snotty type of Kanto fan since they defend everything from the generation so much that they claim everything afterwards has ruined the franchise. People who list Kanto as their fave but openly express respect for others' opinions are the more nice type of Kanto fan to deal with.
I feel that with both GO and Sun & Moon's release, I barely hear any Genwunners around since I guess the Kanto appeal factor with both games (former being initially Gen 1 only and latter having Alolan Forms that are exclusive to Gen 1 Pokemon) ended up being a successful move on Game Freak's part. Now there's the next Pokemon movie as well, which instead of following tradition of taking place in the region the current saga is in, is instead a retelling of Ash's beginning due to 2017 being the 20th anniversary of the anime.