It separates Catholics who follow Church teaching from the "catholics" who gain something from the connection but have no intention of actually practicing what the Church requires.
While many of these folks are either too dumb to understand the issues,ignorant of the teachings of the Church or just want to be liked or politically correct,the rest are very angry (maybe for personal reasons)and,or wish to destroy the Catholic Church because they know it stands against some of the most evil,damaging ideologies that are dedicated to reduce most of mankind to the status of serfs and slaves.