Well said, Alex...I would just note that the quoted piece is a 'good old fashioned polemic' and as such...well...there are better ways to reach a resolution to crises in one's conscience than to rely on polemic works whether directed eastward or westward.
Life is short, tough and nuanced....There are no easy answers except that as has oft been said, Salvation lies in the Church...but for many, ascertaining just where the Church is to be found however, remains the question.
It is far, far easier to ascertain where it is not I suspect, than to be certain where in fact it is....