Russia forced the Ottoman Empire out of Russia just around the turn of the millennia 1900. They’ve fought the Muslims for centuries. The word slave has its origin in “Slav” or “Slavic”, as they were hunted down and captured for the Ottoman slave markets.
The demographics are horrible for Russia: the Muslim birthrate is much higher than the ethnic Russian rate, and they face a grim future because of that trend.
Russia and Israel together as allies? I don’t think so. Russia is very much atheistic whereas Israel is not. But Russia, the U.S.A. and Israel can forge an agreement to keep the Muslims contained mostly in the Middle East. Just have to bring the Europeans on board.
The people I met from Russian, eventually became citizens of America. These people, from Russian, were classified as Russian Jews in their homeland. When the opportunity came they ran as fast as they could for the exits to leave Russia. Some of the stories and words told me of the suffering, by these people at the hands of authorities in Russia, would curl your toenails.