That is very sad, and I will pray for him.
I love the Byzantine Rite and the liturgies are stunningly beautiful, but there is often a problem with people from the “homeland” of the liturgy in question when they are in the US. They still regard it as their possession, something that is all about their former country and not about God. Certainly, this is not true of all of them, but it is something that I have seen happen before.
From reading your posts regularly, I know how hard you (and he, of course) have worked to get this parish going. I hope these people come to their senses; he sounds truly wonderful, the kind of priest most parishes would do anything to get, and it is terrible to think that this is the response of some of the people. It is very sad indeed.
The greatness of the different Eastern rites are the different liturgies. These special parishes are rare gems indeed and that is why it would sadden me when people from the places where those rites originated would place unreal expectations on the pastor or be hostle to those not from the country of origins.