Is the implication that this is somehow in retaliation for the US invasion nine years ago? What did the Syriac Orthodox Christians have to do with that? This is just an excuse to kill people and further persecute Christians. Yeah that had me scratching my head as well. I suppose for fanatics even the slightest excuse is excuse enough.
Lord have mercy!
Edit: Lord have mercy!
Indeed. Remember only a little while ago that they bombed Siadat an-Najat Syriac Catholic
Church (killing 52 people) in "revenge" for some imagined persecution of converts to Islam (that never actually converted) at the hands of the Coptic Orthodox in Egypt...logic has never been a strong suit of Islam, and much less so of radical Islamists.
Lord have mercy on your suffering servants and believers in Iraq. Preserve them and turn their oppressors away in shame.