The learned and wise John T. Pless, a professor at Concordia Theological Seminary in Ft. Wayne, Indiana, warns against fanaticism. He is discussing the recent controversy over a pastor participating in an interfaith service, showing that some on both sides have slipped into fanaticism, as described by both Hermann Sasse (the anti-Nazi confessional Lutheran theologian) and Steven Paulson (the radically Lutheran ELCA theologian). If you remain interested in that particular controversy, which seems to have run its course with the pastor’s apology followed by the synodical president’s apology, follow the link.
However, this is not a post about that, nor do I want that to be the subject of the discussion in the comments. We have exhausted that topic. I will instead excerpt what Prof. Pless says about fanaticism, a far broader and more applicable topic that deserves our reflection.