I don't really think 57chevy has denigrated us Catholics, he seems to have just pointed out why he left and why he thinks we're wrong in a fairly civilised manner.
I think has has shown his only reasons for leaving were superficial falisies, and insulted Catholics whenever the oppurtunity has arisen.
He is more a testament to the sad state of some Catholic education and the sadder state of stuborn students than anything else.