Let me try this a little more slowly...
The fucking Soviet Union, murderer of tens of millions its own citizens, was a permanent member of the security council since the founding of the U.N. That says it all.
If you want to balance Israel's "ethnic cleansing" against the massive atrocities of the U.S.S.R. and a considerable number of other nations that the U.N. has been kissing the ass of for years, go for it.