Paul was speaking of Jesus specifically ("Do you think I came to bring peace on earth? No, I tell you, but division." Luke 12:51) and, yes, of course, people like me who cause division between light and darkness, sheep and goats, clean and unclean, good and evil, right and wrong, true and false, the living and the dead.
What's your point?
Are you one of those dipshits who say "we are all the same inside" when, in fact, some people are pure of mind and the mind of some others is filled with filth, corruption, and dead men's bones?