I'm no fan of Freemasons, but the days of them actually working against the Catholic Church are long over, and that was limited to a few incidents in Europe anyway. This is like an old boogie man tale.
Still, it is against Church law for a Catholic to be a Freemason. It is no longer under the penalty of excommunication, but it is still a grave sin, and the Catholic member may not receive communion.
I think this is an interesting subject. If you can't receive communion, aren't you in effect Ex-COMMUNION-Cated?
Here's an interesting tidbit from EWTN:
"Presumably, there are few if any Christifidelis readers who are unaware that the bishop of Lincoln, Nebraska, the Most Rev. Fabian W. Bruskewitz, on March 19, 1996, using his legitimate authority to make laws which bind members of his flock, published a legislative pronouncement naming twelve organizations, membership in which was defined to be "always perilous to the Catholic Faith and most often is totally incompatible with the Catholic Faith." (Southern Nebraska Register, March 22, 1996.)
The list of organizations contained in the law includes: the Society of St. Pius X and a chapel served by its priests; three non-Catholic organizations which are openly opposed to and contemptuous of the Church's teaching on the sanctity of human life; the Freemasons and four subsidiary groups. Also named are two organizations whose inclusion is sure to cause the most controversy: Call to Action (CTA) and its Nebraska chapter, Call to Action Nebraska. The legislation went on to state: "Any Catholics in and of the Diocese of Lincoln who attain or retain membership in the above listed organizations or groups after April 15, 1996, are by that very fact () under interdict and are absolutely forbidden to receive Holy Communion. Contumacious persistence in such membership for one month following the interdict on [the] part of any such Catholics will by that very fact () cause them to be excommunicated..."
That aside, Padre Pio would be very displeased at such a church erected in his honor.