one group committed a terrorist act and killed a person, the other one didn't. it's a ridiculous false equivalency.
One group committed a terrorist attack, and the other has continuously attacked conservative/right-leaning events to beat up people, destroy property and promote fear amongst conservatives across this entire year. They have the support of people in Hollywood and the media refuses to condemn them on the scale they condemned national socialists even before this terrorist attack. In fact, such a strong outlash from the national socialists can be directly attributed to this group ramping up the hostility in the political climate, to the point of Charlottesville literally reflecting the Weimar Republic.
I think they're equal. It's your opinion whether or not they're equal, but to dismiss the bad they did across a long period of time and at this event because of one particular instance of right-wing terrorism only ramps up the violence more.