[SB00]

Catholics for a Free Choice
A pro-abortion group who is not affiliated with the Catholic Church. If these people don't like where the Church stands, why are they still calling themselves Catholic.

[NYer]

If these people don't like where the Church stands, why are they still calling themselves Catholic.

I hate this expression but ... "because they can". The word "catholic" means "universal". There are many 'catholic' churches that have nothing to do with the Roman Catholic church.