Soros said Trump is putting "pressure of unpredictable force" on Europe.
The Open Society Foundations said staff are being harassed and were not safe.
David Hogg, a Florida student who has been critical of politicians, has been attacked personally by right-wing activists.
Alex Jones’s website InfoWars has been pushing anti-Semitic conspiracies about George Soros for years.
“Wouldn’t it be interesting to find out?” a GOP congressman said about the idea of George Soros's involvement in Charlottesville.
The country’s top Jewish organization has condemned the poster campaign against the billionaire.
The Hungarian-born billionaire investor has long called for financial aid for Ukraine.