Oh, worse example? These people have the jurisdictional right to post their views about Christmas. This is not extremist, this is within their jurisdictions. If they have an argument about the definitional nature of Christmas and G_d being counter to the "Under God" principle of the UNITED STATES OF AMERICA, then I think you make a very good reason for their fears.
Oh wow. If www.noahide.com is not extremist, I don't know what is:
"A gentile...is liable for the death penalty...if he has invented a religious holiday for himself."