Too many catholics, especially here, believe the church may be judged by human standards, and those standards say it is bad to rape children.  However, you correctly point out that the duty of catholics is to support the church, no matter what it does.  So if the bishops protect child rapists and those rapists go on to offend again and again, then we must support the church.  You demonstrate exactly the loyalty to the institution that the bishops desire and expect and should be proud of your stance, regardless of whether it condones child abuse or not.  The important things is not some sense of "right or wrong" but rather, supporting the church, whatever it does.