During the trailer for the movie "Fahrenheit 9/11," there is footage of former President Bush delivering a speech. He states, "T
his is an impressive crowd to have - the Haves and the Have Mores. Some people call you the elite; I call you my base." During the speech to this audience, former President Bush is using the name calling propaganda technique.
A writer can express his/her theme through different techniques. Some examples would be word choice, tone, mood, and even characterization. I hope this helps.