In good conscience?...

What does it mean when one calls oneself a Catholic?

Consider this quotation: "I’m an active Catholic." "Well, as a Catholic, I believe in God and see the mistakes by men in the name of God. Some positions of the Catholic Church, on birth control, against abortion, against homosexuality, in defence of celibacy, and other examples, only reinforce that the Church seems to be out of tune with people’s thinking, and people’s will, not God’s will, for God never mentioned any of that. Men wrote about that, and said it came from God. "

What has happened that somebody who is so at odds with the teaching of the Church still calls himself an active Catholic?

(Incidentally these are the words of an abortionist. See John Smeaton's blog for the full details