No one is obsessing over ex-college players in the NHL. As fans, you follow someone into the NHL because you've become familiar with them. It doesn't matter what team they're on--you're interested in their success.
I haven't liked the Flyers since the Broad Street Bullies days (1970s), but now that Erik Gustafsson (NMU) is playing for them I kind of hope they win.
I'm sure anyone in this forum can think of players they root for even though they're on teams they generally wouldn't care about. It's not obsession, it's interest, curiosity, pride in someone you've seen succeed at a higher level. You've said as much about your ex-gophers: "It's nice to see former Gophers play well."
Relax, enjoy the hockey and try not to compartmentalize everything, open up and start hoping the Blues can turn things around. There are two Minnesotans on that NHL team. Whoops, Backes went to Mankato...sorry.