I wanted to post almost the same comment. While it might sometimes be true, since a practitioner has an easier time to identify a fellow sinner, it's terribly

I wanted to post almost the same comment. While it might sometimes be true, since a practitioner has an easier time to identify a fellow sinner, it's terribly wrong at other times: most upright individuals strongly dislike corruption for instance. I'm wondering what the author is generalizing from himself.