He's the Koch of the left. He funds groups that agree with him politically, and has out-sized influence because of it. Since our own biases allow us to interpret people positively when they agree with us, and vilify them when they disagree with us, Soros and Koch are the various bogeymen and/or heroes depending on a particular point of view.

He also gave a very poor and ill-advised interview, where he once stated that (despite being Jewish) he helped Nazi's confiscate properties from Jews in a sixty minutes interview.

He stated that he didn't help later in the interview, but the damage was done.