this crime is holy-------what kind of literary device is this?

Oxymoron because it contains two contradictory words.

a crime cannot be holy

The phrase "this crime is holy" appears to contain a literary device known as juxtaposition. Juxtaposition is a technique where contrasting ideas, words, or phrases are placed next to each other to highlight their differences or create a vivid comparison. In this case, the words "crime" and "holy" are being used together, which creates an ironic or unexpected contrast.

To identify literary devices like this, it's helpful to carefully analyze the words, phrases, and overall context of the text. In this example, recognizing the contrasting nature of the words "crime" and "holy" allows us to identify the use of juxtaposition.