Back Door is a form of malicious feature in which the program is configured to respond to commands sent to it from the developer. A Universal Back Door is an ability of the developer to remotely change the program to do anything the developer desires it to do. Sometimes Universal Back Doors are called "Auto-Update".
This comment thread is for people to document various implementations of this malicious feature.
Like it or not, but it seems like a large majority of hate toward Jewish people stems from the rate of Jewish success, which is apparently so large, that people form conspiracy theories, which I would love to be true, about Jewish elite classes or whatever, that rig the system in favor of Jews above anyone else ( actually if I think about this hard enough something like this is theoretically possible, but it would be completely decentralized and almost utterly uncoordinated ) . The truth is perhaps anti-climatically mundane in comparison.