What is the theme to this poem? when the nazis came for the communists, i remained silent; i was not a communist. when they locked up the social democrats, i remained silent; i was not a social democrat. when they came for the trade unionists, i did not speak out; i was not a trade unionist. when they came for the jews, i did not speak out; i was not a jew. when they came for me, there was no one left to speak out.