The idea that ANTIFA is the same as groups in 1930's germany is approximately equivalent to someone pointing out that Lincoln was a republican and basing upon this the claim that republicans have black people's best interests at heart.
I'm not trying to get political, I'm just saying that the arguments being made are disingenuous. I hate to overuse the word, but it's really the best match for the situation. Casting the current climate as some battle between good and evil is a gross oversimplification and risks completely missing the point. Groups evolve and simply maintaining a similar name doesn't imply similar motives, structure, or merit.
In any event, if your argument is that ANTIFA is somehow helping us and you intend to make this case by connecting them to the anti-fascists in 1930's germany, I'd feel the need to point out that they didn't particularly help 1930's germany avoid fascism.