White Russia allies with the fascists, can they be stopped?

This is a scenario in which, after years of grueling and brutal Civil War in Russia, the Whites come out on top. However, scarred by the political and economic collapse of their nation, and blaming bolshevism, the White Russians turn to fascism and make alliance with Mussolini and Hitler. They seek to subjugate all the former lands of the Russian Empire and then some, also seeking revenge on Japan and maybe setting their sights on Constantinople too. Can this fascist alliance be stopped from dominating much of the world by the UK-FR-USA ?

Also what are the chances Germany ends up backstabbing Russia at some point anyway?
 
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