Muchacho~Magnifico, While the chat log you provided was minimal, and does not allow for very much analysis, We can assume that you are trying to force my trainee into dropping his cargo.
I am surprised that such a 'tough as nails' kind of guy such as yourself would be brought such hardship by a simple insult.
Your lack of "cohones" aside, it does seem appropriate to provide some etiquette training to our trainees. I expect that insults such as scum, lowlife or nomad entrail would be less rude, and perhaps more applicable.