During World War 1, most of the Allies declared war to Germany, Austria Hungary, Bulgaria and Turkey, but the United States didn't declare war on the latter two nations. I don't know why Harry Truman would make that remark.
IF ISRAEL DOESN'T RECOGNISE THE ARMENIAN GENOCIDE TO AVOID ANGERING TURKEY; THEN WHY DOESN'T THE WEST AVOID RECOGNISING THE HOLOCAUST TO AVOID ANGERING GERMANY?
Caption this Meme 
