There can be pretty good diversity of well-informed and well-argued opinion here. I'm not sure I would call it divisive, but take a look at any of the threads regarding surveillance/police states, economic inequality, geopolitics, etc-- lots of people taking different positions, though admittedly there are a few positions that are more dominant than others.

Interestingly, I think that the SJW-phenomenon would be divisive here as well, but it's seldomly mentioned because of how inane the events which prompt discussion are.

Edit: I appear to have struck a nerve somewhere.