Fighting Nazis is a good thing, but fighting Nazis doesn't necessarily make you or your cause good. By my lights this is simply an obvious fact.Those who excuse the excesses of "antifa" make the same mistake as those who praise the butcher Stalin. Sometimes the enemy of my enemy is no friend but merely another enemy, certainly the case in today's U.S.
The greatest Nazi-killer of the 20th century was Josef Stalin. He also killed millions of his own people and terrorized, oppressed, enslaved or brutalized tens of millions more. The fact that he killed Nazis during WWII (out of self-preservation, not principle) doesn't dilute his evil one bit.
Interesting factoid: Jonah Goldberg is the son of Lucianne Goldberg, founder of the website Lucianne.com which regular readers know we find uber-useful.