The truth of the matter that there was an Armenian genocide but Jews were indeed all behind it.

Short version is that Jews who have infiltrated the Ottoman empire through the "Young Turks" movement pushed Armenians to kill some Muslims then the same Jews pushed the Muslims (Ottomans) to completely kill the Armenians. Many of those Ottoman officers committing the genocide were also Jewish.

Edit: worthy to note that this issue is always brought up whenever the Jew wants to pressure the Turks into something. Azerbaijan in its recent war against Armenia was supplied and supported by Israel. The wife of the president of Azerbaijan and who rules Azerbaijan is a Jewess.