Generally, as not by name, but as part of a group of people. He never called any group of people defective Christians. He referred to defective institutions: "communities" and "churches."
The only backtracking here is yours.
Benedict never referred to ANYONE as a defective Christian. Or can you provide a quote to the contrary?
Are “communities” made up of individuals?
Ever been on O’Reilly’s No Spin Zone?