Volunteers getting kicked out of open-source projects seems to be very popular these days. Recently happened to me too, in a project related to freedom of speech. I guess we senior developers are just such an easily replaceable resource, that even working for free is not good enough for the non-profit project managers, you must also have no life, be available around the clock and you definitely should not be russian.
Discussion
could we fork it?
I had a great time with the developers and artists of said project. A fork at this moment would probably help nobody and just undercut the hard work of the other volunteers. I hope that the project managers will get to a similar point in the future and will have to learn from their mistakes instead of kicking out hard working developers. The project is imho very important for humanity and I still really hope that it will succeed. But sure, if the managers screw it up, a fork might be the way, if its not too late by then.