"Divisive topic" refers to a subject or issue that causes strong disagreements and arguments among people, dividing them into opposing sides. Full definition
The debate about «value added» measures of teaching may be the most divisive topic in teacher - quality policy today. (edweek.org)
If there's one thing we've learned from our time at a women's fashion magazine, it's that florals can be a very divisive topic. (redbookmag.com)
Some might ask, But is it not better to delay so potentially divisive a topic until some more inclusive groundwork has been laid? (religion-online.org)