Do the Label's "Truther" and "Conspiracy theorist" have an intended Pavlovian response ?

Truther is a short hand term for, well, you know. Conspiracy theorist is subjective for sure. Google Frank Luntz. He has made a career helping the right pick just the right words to trigger the emotional responses of their followers. If you can trigger an emotional response that angers your audience, or inspires your audience the substance of your argument becomes irrelevant. This is what substitutes for critical thinking today. It is insidious, no matter what side uses this technique.