Masonry is wrong but since it is not inherently against natural law to join such an organisation without knowing about its dark sides Father Themann's words are true. Of course any Catholic who knows about the evils of masonry or even that it is condemned by the church sins gravely by entering. Anyone who holds Father's words against him and twists them anonymously on the internet will answer for their words at the final judgement. Of course, in order for the SSPX "Resistance" to justify their existence they will frequently grab at straws to find greater foundation for their claims than the few legitimate grievances they have.