According to some posters in other forums who speak Russian, there is more to this story.
Take it with a grain of salt, but this is what someone else wrote:
"In case you want to know... Several days ago he was drunk as hell during his mma seminar (there were around 30 guys there, and of course they paid money for that), he didnt show them anything useful, it was hard just to understand what he was talking.
He spat at some dude at the airport and was behaving like a total jackass. Alexander was always like that. Yes, sometimes he gets drunk and does some stupid things like that. But this was to much even for M-1 and they fired him. The next day he retired.
Sorry if my english was bad
P.S.Alexander was telling that he would go to the UFC and defeat all their fighters in some of his interviews. And he always says, that he is in the top 10 of the best fighters in the world. And you know what? Some people in Russia really believe in that (of course they are not some real mma fans, they all laugh and joke about that)"