During his time as a student, he witnessed vehement demonstrations against Popes St. Pius X and Benedict XV in Rome during an anniversary celebration by the Freemasons. According to St. Maximilian,
They placed the black standard of the "Giordano Brunisti" under the windows of the Vatican. On this standard the archangel, St. Michael, was depicted lying under the feet of the triumphant Lucifer. At the same time, countless pamphlets were distributed to the people in which the Holy Father was attacked shamefully.
He made up a prayer to add to the prayer of the Miraculous Medal.
Oh Mary, conceived without sin, pray for us who have recourse to thee. And for all those who do not have recourse to thee; especially the Masons and all those recommended to thee.
And, he was one of the first saints to realize the importance of media in spreading the Word of God. Here is a link for more information from which the quotations have been taken. I suggest bloggers pray to him for protection and inspiration.
May all who have family members or friends caught in Masonry ask for his intercession to break away from that anti-Catholic movement.