In what universe can a Billionaire ever be "left wing"?
This shows either a fundamental lack of understanding of what "left wing" actually is or an outright lie. Maybe a bit of both.
People on the actual left wing (not liberals or progressives, or even social Democrats), will usually at their core, though to varying degrees, reject the idea that capitalism and democracy are compatible. People on the "left wing" (again, not center or center left but real left wing) think that capitalism is the engine driving the problems we face. Capitalism is a hierarchical system, and while it can be restrained to the extent that democratic systems can co-function, when left to its natural conditions, people will begin to accumulate capital and assets into fewer and fewer hands and those people will then have much more power to control policy. The more that you value Capitalism, the less you will tend to value democracy because the needs of various constituencies will cause inefficiencies in markets and may interfere with the accumulation of capital.
Soros is a Holocaust survivor as well as a survivor of the form of authoritarian Stalinism that chased him and his family out of Hungary. He is driven by a desire not to have something like the Holocaust happen again and the people likely to engage in that kind of behavior are typically right wing. Stalinism is a different beast created under ostensibly left wing ideology, but seemingly corrupted by authoritarianism and Stalin's own psychopathy. Soros is not a friend of Socialism or Communism either. He would never have become a billionaire under either economic/political system.
He is likely a Progressive or Social Democrat. He is using some of his money to prop up more democratic and free societies like in many Western European countries after WWII (after the reconstruction) where as a result of the horrors, they decided to restrain capitlism and spread the benefits of society more equally. Where they restrained extremist thought regarding Nationalism and race. He doesn't want open boarders. He wants countries to treat their citizens well, and barring that he wants immigrants to be accepted safely and treated well by those countries in better situations.
Soros is portrayed as this evil mastermind who wants to destroy societies when at best he is a wealthy man who wants to use some of his wealth to stave off the worst human behavior.
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