yjin117: you confuse individuals within an institution for the institution and the institution for the ideology.  If a teacher molests a student is the entire school corrupt, ought we close the school? If a politician steals or rapes, is the entire government corrupt and are we to do away with the government?  If the government leaders are corrupt are we to do away with democracy all together? 

The ideology of the Catholic faith is intact, just as the ideology of education or democracy.  It's a faith based on sound theology and truth.  A rouge priest no more can taints that than a bad president taints democracy.

Remember that the claims of the Church as Holy is in it's teaching, in it's guidance, with Jesus Christ as the head.  Not all members are holy, and never have been.  Remember that Judas Iscariot was an apostle, hand picked by Jesus Christ; he ended up being a thief and a traitor, not because Jesus failed, but because Judas had free-will, just like the rest of us.

Blessings