good little knee muscles various sceptics have been popping up to point and laugh at the stupid people

You know, Zander, this sounds awfully personal. I had the impression you generally try to adhere to standards of not tarring large groups of people with the bad actions of a few? If so, being a bit more specific about who said what that upset you would be helpful. And you generally try to take issue with the words, and not the people who spoke them? If so, refraining from referring to humans as "knee muscles" might be better suited to your normal pattern of speech?