Odd that you say that. I have several friends who are Freemasons, and they know I am Catholic. They hold the work the Knights of Columbus perform in high regard, and the Knights appreciate the good works of the Masons as well, so I am uncertain where you are getting your information, but perhaps you need to look a little further.
This is on the West Coast, if that means anything.
What I have read about the Freemasons would indicate that the lower degrees are not privy to the real purposes of the organization. I agree that none of the Masons I have met have any hint of the demonic. Nevertheless, great popes of the past(unlike our current pontiff) have universally condemned the organization and levied the penalty of excommunication for joining.