Hmmm...I certainly understand enough of what I read in the Bible to where I don't go around judging and questioning the faith of others based on one remark. ;-)
I'm not questioning anybody's salvation, but the fruit in the article is rotten and good for nothingness.
Nothing wrong in discerning good from bad fruit though faith in Him. Posts 73 & 346 provide similar insight.
The issue of understanding Revelation begins with the ministry of God the Holy Spirit. In advanced study, a considerable amount of Bible doctrine is also useful in understanding His Prophecy. Faith upon faith assists the student in discerning the meanings being communicated in His Word, all of it provided by the work of the Holy Spirit in the individual believer. This also only occurs while the believer remains in fellowship with Him.