In the 1930s, Hitler's Gestapo required pastors to submit church sermons for official approval or they'd be put into a detention camp with Jews.
Pastor Noimuller refused to obey the Gestapo and he was put into a concentration camp. Years later, when the Allies liberated the camp, Pastor Noimuller was more dead than alive but he gave his liberators a scarp of paper on which he'd written:
First they came for the Jews, and I did not speak up because I was not a Jew.
Then they came for the communists and I did not speak up because I was not a communist.
Then they came for the trade unionists and I did not speak up because I was not a trade unionist.
When they came for me there was nobody left to speak up for me.
A timely warning given the hate campaign against refugees that is being whipped up by the Murdoch media empire to increase newspaper sales and TV station ratings.