The Catholic church as a whole is not responsible. From what I understand, the religion itself if sound and true. It's just some of the people involved with the church. Also, It's not only Catholic priests and bishops that do this. There are others in other religions that are guilty of the same thing as well as the untold millions or thousands of people who are guilty of this, but not "in the church's name". They are just using the fact that it is a "Catholic priest' or "Catholic bishop" for the sensationalism, when in fact, there are many, many men and women and teens who are guilty of the same things.
The KKK was killing people and terrorizing others. Not that rape and such is not a form of terrorizing, but it is different.