...Ok, I see where you're coming from. I see that Jeffery Dahmer doesn't look like Jeff the Killer. I see what you mean.
But, that gives you no right to call people "stupid", and rage at them. Sometimes, a person's confused. They might not know what Jeff the Killer was based on, or maybe they haven't read the story yet, so, instead of raging at them, you can politely say "No, Jeff the Killer was not based on Jeffery Dahmer. He is an original character, with no relation to any other serial killer." And you can link them to his story.
And with your whole, um, mentioning of Jeff in the description, do you know for a fact that he doesn't sexually assault people and eat them? No, you don't. We all don't know. We don't know if, deep down, he doesn't mean to kill people. Maybe he enjoys it. He really seemed to enjoy killing his family, from what I heard.
Sorry for the long post.