Oh, I know first-hand that there do exist Catholics who are free-masons. The question is whether they can be Catholics in good standing. Certain state chapters (terminology?) of Freemasons are fairly freindly towards Catholics. Some are even accused of trying to infiltrate Catholicism. Many are expressly anti-Catholic. But freemasonry, itself, probably emerged from Knights Templar who were prosecuted by the Catholic Church for war crimes during the Crusades; the antipathy is most certainly two-way. As many of the Knights Templar refugees fled to the mountains of Switzerland, it's not hard to imagine that they heavily influenced Calvin and other anti-Catholics.
"Certain state chapters (terminology?) of Freemasons are fairly freindly towards Catholics. Some are even accused of trying to infiltrate Catholicism."
That's a switch from your earlier"Freemasons generally disdain Catholics"
Get facts from somewhere other than Wikipedia and sites like The Forbidden Knowledge which makes the claim that the Freemasons caused the terrorist plane hijackings and destruction of the World Trade Center on September 11, 2001.
The Knights Templar were not prosecuted by the Church for "war crimes during the Crusades". Not only was the Order CREATED by the Church but they were one of its strongest pillars.
They were destroyed by the French because of the greed for their loot with the blessing of the Pope of the "Babylonian Captivity". This occurred almost a century after the last crusade. And they were charged with blasphemy not war crimes.
As to the Evil unleashed by the Masons that is refuted by two words, George Washington.