This type of half-truth telling and misrepresentation of Catholic teaching is nothing new. Sites like this one abound on the net. Nothing any Catholic could say would make a dent in such people’s thinking. They are the Michael Moores of religion–innuendo and scare tactics stand in for truth and fair dealing as long as it gets them what they want. My advice is to let them go their own way, but pray for them and those like them. Remember, there are none so blind as those who WILL NOT see.