If “fellowship” is measured by the amount of noise inside the Church before and after Mass, whilst people are trying to offer prayers, examine their conscience and praise God, I want none of it. My wish is for peace and quiet in the Church.
For me, Fellowship carries a connotation of social gathering being the focal point of being at Church. I go to Mass each Sunday, and whenever possible during the week, because I am a Catholic, believe the teachings of the Chuch, and am trying (in varying capacities) to grow and enrich my faith through God. Not because I want to “see” anyone.
At my old Parish, in the “off-season,” there were maybe a dozen of us attending for Mass or a Communion Service. We usually followed up with a cuppa, some biscuits or cake if someone brought something along. We all knew one-another, and would catch-up sometimes, or arrange times of prayer and Adoration.
So when people complain about a lack of “fellowship,” it makes me wonder what their motives are. Do they participate in the daily recitation of the Rosary after Mass? Come along for adoration? Join the choir? Or even the multitude of social happenings on weeknights?
There are plenty of people you can meet and get to know through these activities.
I feel as if people expect “fellowship” to be handed to them on a plate; whether it be a Parish canteen, tea & coffee or whatever. Perhaps they aren’t willing to go and engage someone, or join in the day-to-day motions of the Parish.
Every so often, I attend the Latin Mass chapel about 25 minutes away. Particularly at Saturday or Sunday Masses, people greet me after Mass outside the Chapel. This Chapel has plenty of “happenings” during the week, too, I’m sure they are well-attended. Compared to what some people think, it seems the Traditional Catholics in this community are more willing to say “G’day” than other city parishes I’ve attended.
Just my 2¢ (or maybe $20) worth. Perhaps I’m out of line.
However, this is most certainly not typical behavior for a priest or a parish. You don’t have to go into all the circumstances for the sake of all involved. I’d have to wonder about the context of such an action. Some Catholics live in the midst of very anti-Catholic areas and that sort of thing. Then again, priests are human beings who makes mistakes, just as Protestant ministers or Rabbis are and can do the same. Parishes ought not to be unwelcoming. I’ve never been to one that would make an issue of anyone’s religious affiliation. Indeed, we had a guy at our parish who was an usher and played Santa at Christmas parties. No one knew he was a Protestant until one of the Knights of Columbus asked him to come to an informational meeting for the Order. 
I’m sorry your friend had such an experience. It’s not typical, though, that I can assure you.
. Getting personally invested in an Internet Discussion Forum is often a recipe for grief.