I saw the end (last 15 minutes I think but not sure) of a movie, it should have been in the late 90’s and the movie appeared already old so I would say from the 80’s or even 70’s or before (was in color). The movie was in French but may have been an English one. What I saw was a kind of sect in white and the supposed guru trying to talk in front of them but could not say a word as the sect started applauding as soon as he opened the mouth. There was a kind of red eye which I suppose a kind of god of the sect. Then it seems that the guru was chosen to be sacrificed but not explicitly (led to a place with smoke). All this happens inside a building without windows. Then it is the final scene in front of Westminster Abbay or Big Ben in London with a dwarf dancing and jumping for no reason and it ends there. I found that very funny so want to see the whole movie.
Any help is welcome!