An issue that has been made to appear black or white, wrong or right, one way or the other. These issues are intended to appear as though there are no other alternatives. People tend to polarize issues in an attempt to further their religious, environmental or political agendas.
"It's a polarized issue, you're either part of the solution or you're part of the problem."
"They polarize the issue to make it look like everyone either supports homosexuality or hates homosexuals."