I understand why Turkey is invested in genocide denialism but I've never gotten why it's so much more frothing-at-the-mouth Kill Bill-sirens obsessed with it than, say, the Abe regime.
There's three reason for other countries to have interest in the Armenian genocide; a large Armenian diaspora, a large Turkish/Kurdish diaspora or because of other conflict with Turkey.
In France, Russia and USA as example the interest are caused by the Armenian diaspora. While in Germany it's a mix of push against Turks and Kurds who have a interest in showing Turkey's dirty laundry in public. Of course the fact that many German Kurds have Armenian ancestry or are Yazidi (almost all Turkish Yazidi have emigrated to Germany because of fear of religious percecution) means that they really have a interest in keeping the knowledge of the genocide alive.
Of course the great irony is that if the Turks owned the fact that they commited the genocide, there would be a whole lot less foreign interest in it. But right now the Turks more or less push the Neo-Nazi Holocaust POV on the Armenian Genocide, which is why the subject is so damaging for Turkey.