We all do honour to what we believe when we give witness to those beliefs in civil discourse. I could be right or wrong. You could be right or wrong. But the correctness or incorrectness of ideas and beliefs does not change how we should treat one another — ever.
I do not regret the efforts of reformers over the centuries and millennia to work for changes to the church as an institution or to practices of piety when Christians have lost their way. I do not regret the church rejuvenating efforts of mystics or of theologians who call upon us to reflect upon what it means to be Christian. I do not regret Jan Hus, Martin Luther, John Wesley, or countless others who have pointed out the flaws in the church and called for us to do better. I do not even regret that sometimes the genuine call to growth in faith and piety can mean that institutions and power structures suffer divisions. What I would regret is if we made an idol of an institution of faith instead of being true to the faith itself.