No motives attributed. It read pretty straight forward to me.
Hersey are beliefs that come from man and or the devil not the Holy Spirit Who gives us the Truth. When I hear a religion that claims to teach Christ and His salvation yet adds something like purgatory to the finished work of Jesus Christ on the cross I am concerned for those that follow such dark lies.
Sanctification is a work of the Holy Spirit in us here after being born again not in some place that is neither named or even described in any way in the word of God. Jesus never taught it because it does not exist. It came about because a lot of money could be had be those who feared hell.
To accept that the Roman Catholic Church has any part in Jesus Christ’s church it would have start with the clear evidence they follow His Word. There are catholics that are saved but far to many only hope they are saved....and that is the words out of their own mouths. Faith in Christ and His finished work of salvation is not optional.