"...a religiousity on Iodine opponents and advocates"
Oh yes. Like you, I am neither an Iodine friend nor Iodine foe. Iodine supplementation is an interesting concept, and probably most can benefit from it to a degree. But it has its limitations (read: problems) and there are many unknowns. Unfortunately iodine proponents, who've often seen some benefit to iodine supplementation, have developed a cult-like devotion to the might "I". Any questioning, let alone "critical thinking" of iodine supplementation is not tolerated very well. On the other side iodine supplementation foes view the efforts of the three main iodine doctors (Flechas, ..) as being little more than self-promotion and a sad case of "doctors gone wild".
So don't feel bad about being kicked off the iodine support forum because of your critical thinking. Obviously they are protecting their sacred world from pollution (ie, a perceived threat). But certainly carry on with your personal research. Iodine has been good (mostly) for me but I am extremely measured in how much I take; the really tough part is knowing how much to take and whether your body has really attained iodine sufficiency (or close to it).