I understand why it was banned in the USSR, because it's pretty blatant satire of the USSR. It's also still banned in North Korea for the same reason.
But why was it banned in the United Arab Emirates and Kenya and censored in Vietnam?
It was also briefly banned from 1943-1945 by the Allies of WWII, but I'm fairly certain that's due to the governments of the Allies not wanting anti-Russian (another partner in the Allies) sentiments.