Yes, "antifa" was used before WWII, specifically by mass murderer Vladimir Lenin (before bigger mass murderer Stalin used it). It was used to define anyone not on board with not only Soviets but soviet expansion. Lenin had the goal of expaniding across europe and the world spreading his brand of murderous enslaving  communism. The "Communist International" fomented communist revolution and they used the IDENTICAL flag, motto, and mission statement as "Antifa". Don't believe me? Search for "Communist international" and hit images. Make sure to read the goals of "Communist International" while you're at it.

The left has been using the ploy of characterizing everyone but themselves as "antifascists" for almost 100 years. They, of course, have a far bigger death count and a far longer reign of terror. 

These "antifa" are the same.