Hello…I am sad to hear this. Having worked with priests closely in many areas for mamy years, like RCIA and even an exorcism, I would tend to reflect on this situation and think that maybe this was projected anger. Maybe he had a disagreement with whoever, etc. I have seen emotional abuse from pastors, but I have also seen many abuses from lay-people who think they know more than the priest. There are too many of these. Priests are consecrated souls, but they are also human. I have seen one priest cry over the rejection from many from my parish. The people were downright mean…and too many times, he just acts on his humanity. But he continued to try to be benevolent as best as he could. I have seen another cry because he made a very definite pastoral error…and repented of it. They cry, they laugh, it is so touching to see.
If there were that many people attending daily mass, I see that as a positive sign. If a priest does prefer newer songs than the old traditional ones, well, I would be gentle with him and who knows if he doesn’t come around. If it was projected anger you think, well, why not invite him over for coffee or dinner and chit-chat for a while to see where he is coming from. If the atmosphere calls for it, ask him gently why the outburst? Ask him if there are any ways you could be helpful to him and the parish, etc, etc. I believe this would the wisest thing to do. Sometimes emotions get in the way of our common sense and when we act on them we can cause a lot of damage.
I guess working very closely with priests has rounded my perception of things. If I hadn’t seen their humanity at times, I might think totally different.
If having tried your best at approaching him, and these outbursts continue, then yes, a letter to the Bishop would be called for. And, of course, with a carbon-copy to the priest. I truly hope and pray that it doesn’t have to go that far!
Good luck and God bless…
Shoshana