I have just uploaded to the internet a consolidated file comprising Fr. Paul Stenhouse, M.S.C.'s eight parts article on "THE ANATOMY OF PREJUDICE". It may be viewed in full at http://jloughnan.tripod.com/prejudiceall.htm
 It may be printed out to 28 pages if one chooses to reduce the printout to 70%.
 Part 4 contains a pretty relevant section on "Bad Catholics", viz:

3. 'Bad Catholics,' and the
Church that Christ founded
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The truth that fascinates many fundamentalists today, and that they find both scandalous and titillating is the obvious one that not all Catholics are just and holy, and live edifying lives.
Modern day fundamentalist 'bible' Christians seize upon this phenomenon that has been with the Church since the betrayal of Jesus by Judas, and use it as a pretext for denying the claims of the Catholic Church to be considered as the Body of Christ.
They are not the first to have taken offence at the presence of sinners within the Catholic Church, nor the first to have used this as a weapon against her.
The former Catholic Priest Novatianus in Rome in 250 AD, founder of the Novatians; the former Catholic Bishop Donatus in Carthage between 313-318 AD, founder of the Donatists;and Lollards, all former Catholics, followers of Wyckliffe, founded by Walter Lollard in 1315; the former Catholic Priest Martin Luther in Germany from 15l7 onwards, founder of the Lutherans: all claimed like the fundamentalists that imperfect or sinful people have no place in the Church of Christ; and all were eventually excommunicated by the Catholic Church.
Any Catholic who maintains that sinful people cannot be members of the Church, will be reprimanded by the same Catholic Church for holding opinions that are contrary to the faith.
From the time of Christ and his apostles to the present day, all who make such a claim have been resolutely called into line.
Our Lord himself clearly says that the Church is to be like a net that gathers in all kinds of fish, good and bad. The net with all sorts of fish, (Mt 13,47-50) and the field with weeds and wheat, (Mt 13,24-30) were Christ's own images of his Church.
The fact that the Catholic Church corresponds to this model cannot be used as an argument to prove that she is not the Church that Christ founded. The contrary is the truth.
We cannot expect to find the Catholic Church different from the Church that Christ founded. Of that Church he said, 'Many are called; few are chosen'. (Mt 22,14) They come, they fall away, they leave. As children grow up in a family, and some leave never to return, the time comes eventually when some of the members of Christ's family also fall away, either for a while or for good. Our Lord foresaw this, as the parable of the prodigal son manifests (Lk 15,11-32) and he issues a challenge to the fundamentalists: 'Will you also go away?' (Jn. 6,67)
There has always been what Cardinal Newman called 'a vast load of moral evil,' in the Church. Not because God or his Church wills it, or because it is something to which we can be indifferent, but because human beings are notoriously fickle and imperfect.
And this evil has been found everywhere, at all times, throughout the Church's 2000 year old history. There have been bad popes, bad bishops, bad priests, bad monks, bad nuns, and bad laity.
Fundamentalists who denounce the Catholic Church for containing 'both weeds and wheat,' drop their mask inadvertently, and can be seen for the modern-day Gnostics they are. They have much in common with the Novatians and Donatists and with any of the myriad other Gnostic sects of early, middle and late Christianity that could never bring themselves to accept the consequences of the humanness of Christ.
By rejecting the right of their fellow weak human beings to belong to Christ's Church, fundamentalists are rejecting Christ and his mission to save mankind.
When people claim that some Catholics do not live up to their baptismal vows, that some, if not many, lead worldly lives, never pray, are unforgiving lazy, vengeful, proud, greedy, cruel or even lacking in deep faith - we admit it at once.
'In any great house,' says St Paul to Timothy 'there are not only utensils of gold and silver, but also others of wood or earthernware; the former are valued, the latter held cheap.' (ii, 2,20)
In any great family, there are good and bad. They do not cease to be members of the family because they are unworthy of the love which surrounds them. Until they draw their last breath they will be given the chance to return that love.