When things are described as "controversial," it's usually done with a negative connotation, as in "a controversial new law that many feel restricts their freedom." It seems people tend to describe something as "controversial" only if they personally disagree with it.
I am looking for a word that has the same meaning of "causing equally strong opposing views" without that negative connotation. The only synonyms I have found so far are "contentious" and "argumentative," which both have the same negative connotation of someone deliberately trying to provoke an argument.