Well, perhaps there's some sort of magical dialogue in Jeffe's Mad Max that reveals ingenious secrets, but everything he said about it can be picked up just as easily by watching the dubbed version. It's a much better movie (in my humble opinion) than SE gives it credit for, and one of my favorites. Road Warrior is better overall, but they're both great. Essentially, the first one details a man's decent into revenge and vigilantism--a fall from civilization to sociopathy. The second movie explores the ideas of barbarity and hopelessness, though it ends on an up note (of sorts) as Max is given the incentive to redeem himself. The actual redemption comes in the third movie, which is sadly the weakest of the three--the redemption isn't much, but it's there.
The most intriguing part of the series is the way the environment mirrors Max's mental and emotional state. It's not a movie I'd hold up as a golden sample of sci-fi, because there's simply not much there. As a character study, however, and as an incredibly evocative piece of post-apocalyptic speculation, it's quite good.
I should point out, however, that the overall tone of the series is quite bleak. It's not for everybody.