Abortion is murder, that's the truth. It doesn't matter if you're Catholic, Protestant, or atheist, it's the truth. There is so much medical evidence today that a baby has a heartbeat, and has movements at a point very early in the pregnancy. Killing this baby for a woman's inconvenience is like murdering a baby after it's born.
So us Catholics aren't imposing our religious tenets on others, we are defending those who are the most defenseless and can't speak for themselves.