Regardless of your agenda , to attack or be rude or offensive, detracts from the purpose of your cause .It creates ammunition and distracts , i.e all this conversation about how things should be said ,instead of people supporting the cause .To be derogatory in any way is to be low brow , and creates a chasm in wich those who oppose your points of view can change focus away from the issue at hand. let your enemy be as rude and derogatory as possible , take the higher road , be the bigger person. People will notcie , and respect your actions, your words , and your principles.