Social Hornet

Noun
social hornet (plural social hornets)

A gregarious person who likes to attend parties and other social gatherings with the intent to disrupt the natural flow of conversational towards topics where they hold the "moral" high-ground; a people person who starts debates that have no finite or discernable answer for the sole purpose of being correct through the impossibility of proving them incorrect.

Synonyms: Troll; Jason
Antonyms: Social Butterfly

Only a social hornet would argue: "A lion would whip a polar bear's ass, they only kill things that cant fight back."
"It doesn't matter who's terrain they fight in..."
"A lion would just eat their fill of seals and penguins, the polar bear wouldn't even have a chance"