Why would you not like people to root for your team after they won a WS? A fan is a fan, no matter when they start rooting for a team. I'm lucky to have always been a huge fan of the Yankees, Rangers, and Jets, but some people decide later who they want to like.
I understand, but you can have some self control, some things you said could be taken the wrong way. Baseball is a sport to enjoy, there is absolutly no need for arguing besides the little "ugh i'm dissapointed". So let's just let it be fun.