In an argument which usually generates more heat than light, Freemasonry is one of the most divisive issues in any church. A lot of ministers and pastors won't even mention it because of the potential for division.
The writers don't believe that Freemasons are evil men, but they do believe they are spiritually blinded and deceived. They are not attacking them personally, but they have a strong sense of responsibility to warn them of the dangers they are in if they persist in the Masonic Lodge. They explain this through this booklet.