The Doukhabors

The Doukhabors were rather well known for using nudity as a form of protest.

Aside from the effective value of these protests due to the sensationalism involved, the Doukhabors believed at some level that if God had made the human body, then there was no shame in not covering it up with clothing:

"And under these clothes is my body, and that's the work of God. Now the clothes are our own work, the work of man, and of them I am not ashamed; but the body is the work of God, and of that I am ashamed. Nu, is there reason in that? What is there about the body that man should be ashamed of? If God is not ashamed of it, if it is the very image of God, why should man be? Did Adam have clothes?"

(from As in the Days of Adam from Century magazine, December 1924.)