This is not true. It's not close to true and decent Republicans need to understand this.
The Nazi types used to be tied to Libertarians, Constitution Party or other off brand party. Now they are all in Trump's camp and with the Republicans and influencing from the inside.
The Antifa's are still outside the Democratic Party, for the most part. These people protested the DNC convention where the Nazi's celebrated the RNC convention.
That's the change in America and decent Republicans really need to see it or it's going to get worse.