Why not tell us what is happening to the old churches in Turkey? It would be interesting having your viewpoint as to why they are being turned into mosques. As an aside, I go to a sub shop owned by two Armenian brothers who still have relatives in Turkey. One went there for a wedding recently, and he said it was dangerous there for Christians.
After the WWI, Greece invaded Turkey. Turkey fought them off, after which the armistice included that Turkish people living in Greece would be repatriated to Turkey, and Greece people living in Turkey would be repatriated to Greece. This is nearly 100 years ago. There were churches in Turkey and Mosques in Greece. In both countries, in which I have traveled extensively, the old churches in Turkey and the old mosques in Greece from that time were abandoned because the Greeks in Turkey and the Turks in Greece tended to live in separate villages or communities. In Greece, the mosques have become derilect or have been torn down or converted to something else. In Turkey, the old churches from that time have met the same fate. In fact, in Turkey, you will find, but rarely, entire villages that were abandoned and are now just ruins. Some Christians remained in Turkey. In the islands of Greece, which this situation essentially affected, some Turks remain.
In modern day Turkey, there are many Christians, there are also many Jews. There are churches and synogogues which these people use. There are not being bothered at all by the Turkish Muslims. When I lived there my friends and colleagues were Turkish Muslims, Turkish Jews, and Western Christians. The Turks did not have a problem with Jews or Christians. I don't know what your Armenian friends problem is; truly I had no experience of any dislike or non-acceptance of people of other religions or creeds.
Here is an example of the respect for Christmas which I experienced: the first year I lived there, I went to Athens for Eid as I had time off work. While there I bought an artificial Christmad tree to take back to Turkey. It was in a box. When I was traveling back to Turkey and going through customs, the customs agent started to open the box; while doing so, he asked me what was in it. When I told him it was a Christmas tree, he said "Christmas?" I said, "Yes." He immediately stopped working at opening the box and waved me through. He made a point of showing absolute respect for my religion.
That year I decorated the tree and cooked a traditional American Christmas meal for my Turkish friends, who were delighted and even brought presents, for me and for each other, even though it was something they had never done.
Turkish people do not hate or dislike Christians. The story you have read is someone who wants to create division. Don't be fooled.