Yeah there have been people i've brought to these board game nights who have told me they would probably opt out of any game that included that guy. This is alarming to me because it is very destructive to everything we're trying to accomplish with these events. Also, as for examples/evidence, there was a new girl (I think her name is June) who played Game Of Thrones with us a few weeks ago, and Chris wasn't very nice to her for the entirely of the game....I haven't seen her back at the store since.
Furthermore, he may not understand our semi/non-competitive have a goood time attitude towards group gaming. After our game of Lords Of Waterdeep I overheard him kind of depressingly explain to Aaron how he still hasn't won a board game, and how he feels like he needs to win one really badly.
Also, Aaron who helps organize the raffle and board games for Nathaniel could be a good person to talk to. He's a really nice guy, an employee, and knows who Chris is.